feat: soft entity collision, dead code removal, leaf standability fix

- Add TileOccupancy resource and rebuild_tile_occupancy system to track
  per-tile entity counts for soft collision avoidance
- Add collision_delay to Ambulatory; entities try relative-left step on
  occupied tiles, wait 1 tick, then push through
- Fix leaf canopy standability: leaves are now can_stand_in=true,
  can_stand_on=false (walkable, not standable-on)
- Delete FloorTilePrefab / FixtureTilePrefab / FloorTile / FixtureTile /
  TileState (all fully dead — TileMap + ChunkData are sole truth)
- Delete tile_spawns from TerrainBlob (populated but never consumed)
- Delete leaf ghost entity spawn in forestry (orphaned invisible ECS entity)
- Replace log prefab spawn with inline commands.spawn(Transform, Visibility)
- Add TileMap::remove_fixture for future digging/explosion use
- Skip collision avoidance when current tile has >2 entities (handles spawn
  cluster deadlock)

Cargo.lock

@@ -2432,6 +2432,7 @@ name = "dorf"
 version = "0.1.0"
 dependencies = [
  "ahash",
+ "arrayvec",
  "bevy",
  "bevy_platform",
  "bevy_rand",

Cargo.toml

@@ -17,6 +17,7 @@ rustc-hash = "2.1.1"
 ahash = "0.8.12"
 nohash-hasher = "0.2.0"
 futures-lite = "2.6.1"
+arrayvec = "0.7.6"
 
 [build-dependencies]
 image = "0.25.10"

config.toml

@@ -1,4 +1,4 @@
-initial_chunk_radius = 15
+initial_chunk_radius = 8
 
 [display]
 vsync = "mailbox"

entity_dump_9.52.csv

@@ -0,0 +1,61 @@
+timestamp,entity_id,x,y,z,has_path,path_index,path_len,target_x,target_y,target_z
+9.523,14600,-16.0,32.0,0.0,true,0,56,816.0,-816.0,33.0
+9.523,14601,-0.0,32.0,0.0,true,0,60,640.0,-848.0,33.0
+9.523,14602,-16.0,0.0,0.0,true,0,38,-608.0,-144.0,17.0
+9.523,14603,0.0,-0.0,0.0,true,0,61,960.0,256.0,-15.0
+9.523,14604,16.0,-32.0,16.0,true,0,10,752.0,48.0,17.0
+9.523,14599,16.0,-16.0,16.0,true,0,46,-496.0,704.0,-15.0
+9.523,14598,-32.0,16.0,0.0,true,0,62,-832.0,800.0,-31.0
+9.523,14547,0.0,0.0,0.0,true,0,53,832.0,336.0,1.0
+9.523,14548,0.0,-0.0,0.0,true,0,55,848.0,-752.0,33.0
+9.523,14549,0.0,0.0,0.0,true,0,30,-96.0,464.0,-15.0
+9.523,14550,0.0,-0.0,0.0,true,0,52,816.0,512.0,17.0
+9.523,14551,0.0,-0.0,0.0,true,0,46,720.0,464.0,17.0
+9.523,14552,-0.0,0.0,0.0,true,0,49,768.0,-128.0,33.0
+9.523,14553,0.0,0.0,0.0,true,0,42,656.0,-400.0,49.0
+9.523,14554,-0.0,0.0,0.0,true,0,34,-512.0,-416.0,49.0
+9.523,14555,-0.0,-0.0,0.0,true,0,49,144.0,768.0,17.0
+9.523,14597,16.0,16.0,0.0,true,0,58,-256.0,928.0,-15.0
+9.523,14557,0.0,0.0,0.0,true,0,40,624.0,160.0,1.0
+9.523,14558,-0.0,0.0,0.0,true,0,44,96.0,688.0,17.0
+9.523,14559,0.0,-0.0,0.0,true,0,61,352.0,960.0,33.0
+9.523,14560,0.0,0.0,0.0,true,0,46,-704.0,-352.0,33.0
+9.523,14561,-0.0,-0.0,0.0,true,0,31,480.0,80.0,1.0
+9.523,14562,0.0,0.0,0.0,true,0,46,-272.0,-720.0,65.0
+9.523,14563,-0.0,-0.0,0.0,true,0,41,640.0,64.0,1.0
+9.523,14564,-0.0,0.0,0.0,true,0,43,672.0,176.0,1.0
+9.523,14565,0.0,0.0,0.0,true,0,54,-64.0,-848.0,49.0
+9.523,14566,-0.0,-0.0,0.0,true,0,51,-640.0,-768.0,49.0
+9.523,14596,-16.0,0.0,0.0,true,0,41,-512.0,-592.0,49.0
+9.523,14568,0.0,0.0,0.0,true,0,32,224.0,-464.0,33.0
+9.523,14569,0.0,-0.0,0.0,true,0,52,-656.0,784.0,-15.0
+9.523,14570,-0.0,-0.0,0.0,true,0,33,-512.0,256.0,-31.0
+9.523,14571,-0.0,0.0,0.0,true,0,49,176.0,-768.0,33.0
+9.523,14572,-0.0,-0.0,0.0,true,0,40,-272.0,-624.0,49.0
+9.523,14573,-0.0,0.0,0.0,true,0,61,960.0,336.0,1.0
+9.523,14595,-16.0,32.0,0.0,true,0,54,288.0,-816.0,17.0
+9.523,14575,0.0,-0.0,0.0,true,0,31,336.0,464.0,17.0
+9.523,14576,0.0,0.0,0.0,true,0,63,992.0,-64.0,1.0
+9.523,14577,-0.0,-0.0,0.0,true,0,47,-736.0,-112.0,17.0
+9.523,14578,-0.0,-0.0,0.0,true,0,58,368.0,896.0,33.0
+9.523,14579,0.0,0.0,0.0,true,0,40,-464.0,512.0,-15.0
+9.523,14580,-0.0,-0.0,0.0,true,0,42,-288.0,-656.0,65.0
+9.523,14581,0.0,-0.0,0.0,true,0,47,128.0,736.0,17.0
+9.523,14582,0.0,0.0,0.0,true,0,47,736.0,-400.0,49.0
+9.523,14583,-0.0,0.0,0.0,true,0,45,-368.0,-704.0,65.0
+9.523,14594,0.0,0.0,0.0,true,0,40,-464.0,512.0,-15.0
+9.523,14585,0.0,0.0,0.0,true,0,56,-880.0,336.0,-15.0
+9.523,14586,0.0,-0.0,0.0,true,0,64,784.0,992.0,17.0
+9.523,14587,0.0,0.0,0.0,true,0,64,896.0,-512.0,49.0
+9.523,14588,0.0,-0.0,0.0,true,0,30,-464.0,288.0,-31.0
+9.523,14592,0.0,0.0,0.0,true,0,50,48.0,-784.0,33.0
+9.523,14590,0.0,0.0,0.0,true,0,44,688.0,-224.0,49.0
+9.523,14591,-0.0,-0.0,0.0,true,0,46,-720.0,448.0,-31.0
+9.523,14545,0.0,-0.0,0.0,true,0,20,80.0,-304.0,33.0
+9.523,14546,0.0,0.0,0.0,true,0,5,368.0,576.0,17.0
+9.523,14556,0.0,0.0,0.0,true,0,9,640.0,576.0,17.0
+9.523,14567,0.0,-0.0,0.0,true,0,13,-528.0,-96.0,17.0
+9.523,14574,0.0,0.0,0.0,true,0,13,-640.0,64.0,1.0
+9.523,14584,0.0,0.0,0.0,true,0,13,-864.0,0.0,1.0
+9.523,14589,-0.0,-0.0,0.0,true,0,19,-112.0,-288.0,33.0
+9.523,14593,-0.0,-0.0,0.0,true,0,10,528.0,-32.0,17.0

src/constants.rs

@@ -5,16 +5,11 @@ pub const ITILE_SIZE: i32 = TILE_SIZE as i32;
 pub const SEED: u32 = 420;
 
 pub const PATHFINDER_SHORT_PATH_MAX_TILES: i32 = 64;
-pub const PATHFINDER_MAX_NODES: usize = 5000;
+pub const PATHFINDER_MAX_NODES: usize = 15000;
-pub const PATHFINDER_WAYPOINT_THRESHOLD_TILES: i32 = 100;
+pub const PATHFINDER_PROVISIONAL_NODE_LIMIT: usize = 256;
-pub const PATHFINDER_PROVISIONAL_NODE_LIMIT: usize = 64;
 
 // Hierarchical pathfinding thresholds
 // Tier 1: Same/adjacent chunk -> sync A* (fast, ~87µs)
 // Tier 2: 2-4 chunks away -> Provisional + full path via queue
 // Tier 3: >4 chunks away -> Hierarchical chunk-path + async segmented A*
 pub const PATHFINDER_HIERARCHICAL_THRESHOLD_CHUNKS: i32 = 4;
-pub const PATHFINDER_ASYNC_NODE_BUDGET_PER_FRAME: usize = 2000;
-
-// Snapshot bounds for async pathfinding (in chunks)
-pub const PATHFINDER_SNAPSHOT_CHUNK_RADIUS: i32 = 2;

src/debug/entity_dump.rs

@@ -0,0 +1,74 @@
+use bevy::prelude::*;
+use std::fs::OpenOptions;
+use std::io::Write;
+
+use crate::entities::shared_components::Ambulatory;
+
+pub fn dump_entity_positions(
+    keys: Res<ButtonInput<KeyCode>>,
+    time: Res<Time>,
+    query: Query<(Entity, &Transform, Option<&Ambulatory>), With<Ambulatory>>,
+) {
+    if !keys.just_pressed(KeyCode::Space) {
+        return;
+    }
+
+    let timestamp = time.elapsed_secs();
+    let filename = format!("entity_dump_{:.2}.csv", timestamp);
+
+    let mut file = match OpenOptions::new()
+        .create(true)
+        .write(true)
+        .truncate(true)
+        .open(&filename)
+    {
+        Ok(f) => f,
+        Err(e) => {
+            eprintln!("Failed to create dump file: {}", e);
+            return;
+        }
+    };
+
+    writeln!(
+        file,
+        "timestamp,entity_id,x,y,z,has_path,path_index,path_len,target_x,target_y,target_z"
+    )
+    .ok();
+
+    let mut count = 0;
+    for (entity, transform, ambulatory) in query.iter() {
+        let pos = transform.translation;
+        let (has_path, path_index, path_len, tx, ty, tz) = match ambulatory {
+            Some(a) => {
+                let path_len = a.current_path.as_ref().map(|p| p.len()).unwrap_or(0);
+                let has_path = path_len > 0;
+                let (tx, ty, tz) = match a.target {
+                    Some(t) => (t.x, t.y, t.z),
+                    None => (0.0, 0.0, 0.0),
+                };
+                (has_path, a.path_index, path_len, tx, ty, tz)
+            }
+            None => (false, 0, 0, 0.0, 0.0, 0.0),
+        };
+
+        writeln!(
+            file,
+            "{:.3},{},{:.1},{:.1},{:.1},{},{},{},{:.1},{:.1},{:.1}",
+            timestamp,
+            entity.index(),
+            pos.x,
+            pos.y,
+            pos.z,
+            has_path,
+            path_index,
+            path_len,
+            tx,
+            ty,
+            tz,
+        )
+        .ok();
+        count += 1;
+    }
+
+    println!("[DUMP] {} entities written to {}", count, filename);
+}

src/debug/mod.rs

@@ -0,0 +1 @@
+pub mod entity_dump;

src/entities/livestock/pig.rs

@@ -30,6 +30,7 @@ impl Pig {
                 path_index: 0,
                 step_recovery: 0,
                 validation_cooldown: 0,
+                collision_delay: 0,
             },
             sprite: Sprite {
                 image: asset_server.load("pig.png"),

src/entities/livestock/rabbit.rs

@@ -27,6 +27,7 @@ impl Rabbit {
                 path_index: 0,
                 step_recovery: 0,
                 validation_cooldown: 0,
+                collision_delay: 0,
             },
             sprite: Sprite {
                 image: asset_server.load("rabbit.png"),

src/entities/sentient/dorf.rs

@@ -27,6 +27,7 @@ impl Dorf {
                 path_index: 0,
                 step_recovery: 0,
                 validation_cooldown: 0,
+                collision_delay: 0,
             },
             sprite: Sprite {
                 image: asset_server.load("dorf.png"),

src/entities/shared_components/ambulatory.rs

@@ -10,6 +10,7 @@ pub struct Ambulatory {
     pub target: Option<Vec3>,
     pub step_recovery: u32,
     pub validation_cooldown: u8,
+    pub collision_delay: u8,
 }
 
 impl Default for Ambulatory {
@@ -22,6 +23,7 @@ impl Default for Ambulatory {
             target: None,
             step_recovery: 0,
             validation_cooldown: 0,
+            collision_delay: 0,
         }
     }
 }

src/entities/shared_systems/mod.rs

@@ -1 +1,2 @@
+pub mod occupancy;
 pub mod pathfinding;

src/entities/shared_systems/occupancy.rs

@@ -0,0 +1,33 @@
+use crate::constants::ITILE_SIZE;
+use crate::entities::shared_components::Ambulatory;
+use bevy::prelude::*;
+use rustc_hash::FxHashMap;
+
+#[derive(Resource, Default)]
+pub struct TileOccupancy {
+    pub counts: FxHashMap<(i32, i32), u8>,
+}
+
+impl TileOccupancy {
+    #[inline]
+    pub fn count_at(&self, world_pos: Vec3) -> u8 {
+        let tx = (world_pos.x as i32) / ITILE_SIZE;
+        let ty = (world_pos.y as i32) / ITILE_SIZE;
+        *self.counts.get(&(tx, ty)).unwrap_or(&0)
+    }
+}
+
+pub fn rebuild_tile_occupancy(
+    mut occupancy: ResMut<TileOccupancy>,
+    query: Query<&Transform, With<Ambulatory>>,
+) {
+    occupancy.counts.clear();
+    for transform in query.iter() {
+        let tx = (transform.translation.x as i32) / ITILE_SIZE;
+        let ty = (transform.translation.y as i32) / ITILE_SIZE;
+        let count = occupancy.counts.entry((tx, ty)).or_insert(0);
+        if *count < 255 {
+            *count += 1;
+        }
+    }
+}

src/entities/shared_systems/pathfinding.rs

@@ -61,8 +61,9 @@ use std::{cell::RefCell, collections::BinaryHeap, collections::VecDeque, time::I
 
 use crate::constants::{
     ITILE_SIZE, PATHFINDER_HIERARCHICAL_THRESHOLD_CHUNKS, PATHFINDER_MAX_NODES,
-    PATHFINDER_PROVISIONAL_NODE_LIMIT, TILE_SIZE,
+    PATHFINDER_PROVISIONAL_NODE_LIMIT, PIXEL_RATIO, TILE_SIZE,
 };
+use crate::entities::shared_systems::occupancy::{rebuild_tile_occupancy, TileOccupancy};
 use crate::world::tiles::TileMap;
 use crate::world::{
     chunks::CHUNK_SIZE,
@@ -215,9 +216,16 @@ impl Plugin for PathfindingPlugin {
             .insert_resource(crate::entities::shared_components::CompletedPaths::default())
             .insert_resource(crate::entities::shared_components::PathRequestCounter::default())
             .insert_resource(PathRequestQueue::default())
+            .init_resource::<TileOccupancy>()
             .add_systems(
                 FixedUpdate,
-                (prepare_paths, update_wandering_targets, movement).chain(),
+                (
+                    rebuild_tile_occupancy,
+                    prepare_paths,
+                    update_wandering_targets,
+                    movement,
+                )
+                    .chain(),
             )
             .add_systems(
                 PostUpdate,
@@ -266,10 +274,11 @@ pub fn prepare_paths(
             ambulatory.path_index = 0;
         } else if chunk_distance > PATHFINDER_HIERARCHICAL_THRESHOLD_CHUNKS {
             let chunk_path = calculate_chunk_path(&chunk_map, start_chunk, goal_chunk);
+            let provisional_goal = goal;
             let provisional = calculate_provisional_path(
                 &tilemap,
                 start,
-                goal,
+                provisional_goal,
                 PATHFINDER_PROVISIONAL_NODE_LIMIT,
             );
             if !provisional.is_empty() {
@@ -296,9 +305,15 @@ pub fn prepare_paths(
                     });
             } else {
                 let path = calculate_path_benchmarked(&tilemap, start, goal);
+                if path.len() <= 1 {
+                    // Path failed — clear target so entity picks a new reachable one
+                    ambulatory.target = None;
+                    ambulatory.current_path = None;
+                } else {
                     ambulatory.current_path = Some(path);
                     ambulatory.path_index = 0;
                 }
+            }
         } else {
             let provisional = calculate_provisional_path(
                 &tilemap,
@@ -326,28 +341,29 @@ pub fn prepare_paths(
                     });
             } else {
                 let path = calculate_path_benchmarked(&tilemap, start, goal);
+                if path.len() <= 1 {
+                    // Path failed — clear target so entity picks a new reachable one
+                    ambulatory.target = None;
+                    ambulatory.current_path = None;
+                } else {
                     ambulatory.current_path = Some(path);
                     ambulatory.path_index = 0;
                 }
             }
         }
     }
+}
 
 pub fn process_path_queue(
     mut commands: Commands,
     mut queue: ResMut<PathRequestQueue>,
     tilemap: Res<TileMap>,
-    _chunk_map: Res<ChunkMap>,
+    chunk_map: Res<ChunkMap>,
-    mut rng_q: Query<&mut WyRand, With<GlobalRng>>,
     mut query: Query<
         (Entity, &mut Ambulatory, &Transform),
         With<crate::entities::shared_components::PendingPath>,
     >,
 ) {
-    let Ok(mut rng) = rng_q.single_mut() else {
-        return;
-    };
-
     let mut processed = 0;
     while processed < MAX_PATHS_PER_FRAME {
         if let Some(request) = queue.pending.pop_front() {
@@ -360,13 +376,20 @@ pub fn process_path_queue(
                     let current_chunk = world_to_chunk(actual_start);
                     if let Some(next_chunk) = chunk_waypoints.iter().find(|&&c| c != current_chunk)
                     {
-                        let waypoint = directional_chunk_waypoint(
+                        match directional_chunk_waypoint(
                             actual_start,
                             *next_chunk,
                             request.goal,
                             &tilemap,
-                            &mut rng,
+                            &chunk_map,
-                        );
+                        ) {
+                            None => {
+                                // Chunk unloaded or no standable tiles — abandon this path,
+                                // entity will retarget via prepare_paths next frame
+                                ambulatory.current_path = None;
+                                ambulatory.target = None;
+                            }
+                            Some(waypoint) => {
                                 let segment_path =
                                     calculate_path_benchmarked(&tilemap, actual_start, waypoint);
                                 if !segment_path.is_empty() {
@@ -374,6 +397,8 @@ pub fn process_path_queue(
                                     ambulatory.path_index = 0;
                                 }
                             }
+                        }
+                    }
                 } else {
                     let full_path =
                         calculate_path_benchmarked(&tilemap, actual_start, request.goal);
@@ -447,18 +472,57 @@ pub fn update_wandering_targets(
         return;
     };
 
-    for (mut ambulatory, _) in query.iter_mut() {
+    for (mut ambulatory, transform) in query.iter_mut() {
-        if ambulatory.target.is_none()
+        if ambulatory.target.is_none() {
-            || (ambulatory.current_path.is_some()
+            // Only target interior chunks — exclude boundary chunks that
-                && ambulatory.path_index >= ambulatory.current_path.as_ref().unwrap().len())
+            // have unloaded neighbours, which strand entities at world edges.
+            let current_chunk = world_to_chunk(transform.translation.as_ivec3());
+
+            // Reservoir sampling - pick one interior chunk with zero allocation
+            let mut chosen: Option<IVec2> = None;
+            let mut count = 0usize;
+            for &chunk in chunk_map.loaded_chunks.keys() {
+                let dx = (chunk.x - current_chunk.x).abs();
+                let dy = (chunk.y - current_chunk.y).abs();
+                if dx <= 2 && dy <= 2 {
+                    continue;
+                }
+                if !chunk_map
+                    .loaded_chunks
+                    .contains_key(&IVec2::new(chunk.x + 1, chunk.y))
                 {
-            let loaded_chunks: Vec<&IVec2> = chunk_map.loaded_chunks.keys().collect();
+                    continue;
-            if !loaded_chunks.is_empty() {
+                }
-                let random_index = rng.random_range(0..loaded_chunks.len());
+                if !chunk_map
-                if let Some(&chunk_pos) = loaded_chunks.get(random_index) {
+                    .loaded_chunks
+                    .contains_key(&IVec2::new(chunk.x - 1, chunk.y))
+                {
+                    continue;
+                }
+                if !chunk_map
+                    .loaded_chunks
+                    .contains_key(&IVec2::new(chunk.x, chunk.y + 1))
+                {
+                    continue;
+                }
+                if !chunk_map
+                    .loaded_chunks
+                    .contains_key(&IVec2::new(chunk.x, chunk.y - 1))
+                {
+                    continue;
+                }
+                count += 1;
+                if rng.random_range(0..count) == 0 {
+                    chosen = Some(chunk);
+                }
+            }
+
+            // Fallback to any chunk if no interior chunks found (small map / startup)
+            let target_chunk = chosen.or_else(|| chunk_map.loaded_chunks.keys().next().copied());
+
+            if let Some(chunk_pos) = target_chunk {
                 let chunk_x = chunk_pos.x * CHUNK_SIZE;
                 let chunk_y = chunk_pos.y * CHUNK_SIZE;
-
                 let target_x = chunk_x + rng.random_range(0..CHUNK_SIZE);
                 let target_y = chunk_y + rng.random_range(0..CHUNK_SIZE);
 
@@ -484,9 +548,12 @@ pub fn update_wandering_targets(
         }
     }
 }
-}
 
-pub fn movement(mut query: Query<(&mut Ambulatory, &mut Transform)>, tilemap: Res<TileMap>) {
+pub fn movement(
+    mut query: Query<(&mut Ambulatory, &mut Transform)>,
+    tilemap: Res<TileMap>,
+    occupancy: Res<TileOccupancy>,
+) {
     query
         .par_iter_mut()
         .for_each(|(mut ambulatory, mut transform)| {
@@ -528,6 +595,42 @@ pub fn movement(mut query: Query<(&mut Ambulatory, &mut Transform)>, tilemap: Re
             if let Some(path) = &ambulatory.current_path {
                 if ambulatory.path_index < path.len() {
                     let next_point = path[ambulatory.path_index];
+
+                    if ambulatory.collision_delay > 0 {
+                        ambulatory.collision_delay -= 1;
+                        return;
+                    }
+
+                    let current_crowded = occupancy.count_at(transform.translation) > 2;
+                    let occupied = !current_crowded && occupancy.count_at(next_point) > 0;
+                    if occupied {
+                        let move_dir = next_point - transform.translation;
+                        if move_dir.length_squared() > 0.0 {
+                            let left_dir =
+                                Vec3::new(-move_dir.y, move_dir.x, 0.0).normalize() * TILE_SIZE;
+                            let left_raw = transform.translation + left_dir;
+                            let left_point = Vec3::new(
+                                (left_raw.x / TILE_SIZE).round() * TILE_SIZE,
+                                (left_raw.y / TILE_SIZE).round() * TILE_SIZE,
+                                transform.translation.z,
+                            );
+                            let left_free = tilemap.is_standable(left_point.as_ivec3())
+                                && occupancy.count_at(left_point) == 0;
+
+                            if left_free {
+                                if left_dir.x > 0.0 {
+                                    transform.scale.x = PIXEL_RATIO;
+                                } else if left_dir.x < 0.0 {
+                                    transform.scale.x = -PIXEL_RATIO;
+                                }
+                                transform.translation = left_point;
+                                return;
+                            }
+                        }
+                        ambulatory.collision_delay = 1;
+                        return;
+                    }
+
                     let direction = (next_point - transform.translation).normalize();
                     transform.translation = next_point;
 
@@ -542,9 +645,13 @@ pub fn movement(mut query: Query<(&mut Ambulatory, &mut Transform)>, tilemap: Re
                     }
                 } else {
                     ambulatory.current_path = None;
+                    if let Some(target) = ambulatory.target {
+                        if transform.translation.distance(target) < TILE_SIZE * 2.0 {
                             ambulatory.target = None;
                         }
                     }
+                }
+            }
         });
 }
 
@@ -575,44 +682,28 @@ fn directional_chunk_waypoint(
     next_chunk: IVec2,
     goal: IVec3,
     tilemap: &TileMap,
-    _rng: &mut WyRand,
+    chunk_map: &ChunkMap,
-) -> IVec3 {
+) -> Option<IVec3> {
+    if !chunk_map.loaded_chunks.contains_key(&next_chunk) {
+        return None;
+    }
+
     let cx = next_chunk.x * CHUNK_SIZE;
     let cy = next_chunk.y * CHUNK_SIZE;
-
-    // Determine entry edge of the destination chunk.
-    // We work in ITILE units so 1 step = one tile of movement.
     let cur_tile = current_pos / ITILE_SIZE;
     let goal_tile = goal / ITILE_SIZE;
     let dir = goal_tile - cur_tile;
+    let straight = goal - current_pos;
 
-    // Edge: X-dominant → top/bottom; Y-dominant → left/right; tie → use Y
+    let mut candidates = arrayvec::ArrayVec::<IVec3, 16>::new();
-    let (fixed_axis, fixed_tile, var_min, var_max): (bool, i32, i32, i32) =
-        if dir.x.abs() >= dir.y.abs() {
-            // Moving east (+) or west (-)
-            if dir.x >= 0 {
-                (true, cx + CHUNK_SIZE - 1, cy, cy + CHUNK_SIZE - 1) // east edge
-            } else {
-                (true, cx, cy, cy + CHUNK_SIZE - 1) // west edge
-            }
-        } else {
-            // Moving north (+) or south (-)
-            if dir.y >= 0 {
-                (false, cy + CHUNK_SIZE - 1, cx, cx + CHUNK_SIZE - 1) // north edge
-            } else {
-                (false, cy, cx, cx + CHUNK_SIZE - 1) // south edge
-            }
-        };
 
-    // Collect up to 8 standable edge tiles.
+    let mut scan_edge = |fixed_axis: bool, fixed_tile: i32, var_min: i32, var_max: i32| {
-    let mut candidates: Vec<IVec3> = Vec::with_capacity(8);
         let var_range = var_max - var_min;
         let step = if var_range <= 0 {
             1
         } else {
             (var_range / 7).max(1)
         };
-
         let mut var = var_min;
         while var <= var_max {
             let (tile_x, tile_y) = if fixed_axis {
@@ -620,8 +711,6 @@ fn directional_chunk_waypoint(
             } else {
                 (var, fixed_tile)
             };
-
-        // Match the z-level of the current tile so we don't jump z-levels here.
             let world_pos = IVec3::new(
                 tile_x * ITILE_SIZE,
                 tile_y * ITILE_SIZE,
@@ -629,39 +718,94 @@ fn directional_chunk_waypoint(
             );
             if tilemap.is_standable(world_pos) {
                 candidates.push(world_pos);
-            if candidates.len() >= 8 {
-                break;
             }
-        }
-
             var += step;
         }
+    };
+
+    let near_diagonal = (dir.x.abs() - dir.y.abs()).abs() < CHUNK_SIZE / 2;
+
+    if dir.x.abs() >= dir.y.abs() {
+        scan_edge(
+            true,
+            if dir.x >= 0 { cx } else { cx + CHUNK_SIZE - 1 },
+            cy,
+            cy + CHUNK_SIZE - 1,
+        );
+        if near_diagonal {
+            scan_edge(
+                false,
+                if dir.y >= 0 { cy } else { cy + CHUNK_SIZE - 1 },
+                cx,
+                cx + CHUNK_SIZE - 1,
+            );
+        }
+    } else {
+        scan_edge(
+            false,
+            if dir.y >= 0 { cy } else { cy + CHUNK_SIZE - 1 },
+            cx,
+            cx + CHUNK_SIZE - 1,
+        );
+        if near_diagonal {
+            scan_edge(
+                true,
+                if dir.x >= 0 { cx } else { cx + CHUNK_SIZE - 1 },
+                cy,
+                cy + CHUNK_SIZE - 1,
+            );
+        }
+    }
 
     if candidates.is_empty() {
-        // Fallback: chunk centre (the old behaviour)
+        let centre = IVec3::new(
-        IVec3::new(
             (cx + CHUNK_SIZE / 2) * ITILE_SIZE,
             (cy + CHUNK_SIZE / 2) * ITILE_SIZE,
             cur_tile.z * ITILE_SIZE,
-        )
+        );
+        if tilemap.is_standable(centre) {
+            return Some(centre);
+        }
+        for lx in 0..CHUNK_SIZE {
+            for ly in 0..CHUNK_SIZE {
+                let p = IVec3::new(
+                    (cx + lx) * ITILE_SIZE,
+                    (cy + ly) * ITILE_SIZE,
+                    cur_tile.z * ITILE_SIZE,
+                );
+                if tilemap.is_standable(p) {
+                    return Some(p);
+                }
+            }
+        }
+        None
     } else {
-        // Pick the candidate closest to the straight-line projection.
+        // Find the candidate most aligned with the straight-line direction
-        let straight = goal - current_pos;
+        let best = candidates
-        let _straight_len_sq =
-            straight.x * straight.x + straight.y * straight.y + straight.z * straight.z;
-
-        candidates
             .iter()
-            .min_by(|&&a, &&b| {
+            .enumerate()
+            .max_by(|(_, &a), (_, &b)| {
                 let da = a - current_pos;
                 let db = b - current_pos;
-                // Dot product with straight direction: higher = more aligned
+                (da.x * straight.x + da.y * straight.y + da.z * straight.z)
-                let proj_a = (da.x * straight.x + da.y * straight.y + da.z * straight.z) as i64;
+                    .cmp(&(db.x * straight.x + db.y * straight.y + db.z * straight.z))
-                let proj_b = (db.x * straight.x + db.y * straight.y + db.z * straight.z) as i64;
-                proj_b.cmp(&proj_a)
             })
-            .copied()
+            .map(|(idx, _)| idx)
-            .unwrap()
+            .unwrap_or(0);
+
+        // Spread entities using both their start position AND goal position as entropy.
+        // current_pos varies per entity (each is at a different world position).
+        // goal varies per entity (each has a different random wander target).
+        // Together they produce unique spread values for entities even when
+        // heading through the same chunk, without needing to pass entity ID.
+        let entropy = (cur_tile.x.unsigned_abs() as usize)
+            .wrapping_mul(1619)
+            .wrapping_add((cur_tile.y.unsigned_abs() as usize).wrapping_mul(31337))
+            .wrapping_add((goal_tile.x.unsigned_abs() as usize).wrapping_mul(6271))
+            .wrapping_add((goal_tile.y.unsigned_abs() as usize).wrapping_mul(2053));
+        let spread = entropy % candidates.len();
+        let idx = (best + spread) % candidates.len();
+        Some(candidates[idx])
     }
 }
 
@@ -727,103 +871,6 @@ fn reconstruct_path(came_from: &FxHashMap<IVec3, IVec3>, mut current: IVec3) ->
     path
 }
 
-fn line_of_sight(tilemap: &TileMap, from: IVec3, to: IVec3) -> bool {
-    let dx = (to.x - from.x).abs();
-    let dy = (to.y - from.y).abs();
-    let dz = (to.z - from.z).abs();
-    let sx = if from.x < to.x {
-        1
-    } else if from.x > to.x {
-        -1
-    } else {
-        0
-    };
-    let sy = if from.y < to.y {
-        1
-    } else if from.y > to.y {
-        -1
-    } else {
-        0
-    };
-    let sz = if from.z < to.z {
-        1
-    } else if from.z > to.z {
-        -1
-    } else {
-        0
-    };
-    let mut x = from.x;
-    let mut y = from.y;
-    let mut z = from.z;
-    let mut err_x = dx / 2;
-    let mut err_y = dy / 2;
-    let mut err_z = dz / 2;
-    let mut err = err_x + err_y + err_z;
-    let steps = (dx + dy + dz) as i32;
-    for _ in 0..steps {
-        if !is_standable_tile(tilemap, IVec3::new(x, y, z)) {
-            return false;
-        }
-        if err_x < 0 {
-            x += sx;
-            err_x += dy + dz;
-        } else if err_x >= dx {
-            x -= sx;
-            err_x -= dy + dz;
-        }
-        if err_y < 0 {
-            y += sy;
-            err_y += dx + dz;
-        } else if err_y >= dy {
-            y -= sy;
-            err_y -= dx + dz;
-        }
-        if err_z < 0 {
-            z += sz;
-            err_z += dx + dy;
-        } else if err_z >= dz {
-            z -= sz;
-            err_z -= dx + dy;
-        }
-        if x == to.x && y == to.y && z == to.z {
-            return true;
-        }
-        err = err_x + err_y + err_z;
-    }
-    is_standable_tile(tilemap, to)
-}
-
-fn theta_line_cost(from: IVec3, to: IVec3) -> i32 {
-    let dx = (to.x - from.x).abs() / ITILE_SIZE;
-    let dy = (to.y - from.y).abs() / ITILE_SIZE;
-    let dz = (to.z - from.z).abs() / ITILE_SIZE;
-    let dmax = dx.max(dy).max(dz);
-    let dmid = dx.min(dy).min(dz);
-    let dmin = dx + dy + dz - dmax - dmid;
-    (10 * dmax + 4 * dmid + dmin).max(10)
-}
-
-fn smooth_path(path: &[Vec3], tilemap: &TileMap) -> Vec<Vec3> {
-    if path.len() < 3 {
-        return path.to_vec();
-    }
-    let mut result = Vec::with_capacity(path.len());
-    result.push(path[0]);
-    let mut i = 0;
-    while i < path.len() - 1 {
-        let mut j = path.len() - 1;
-        while j > i + 1 {
-            if line_of_sight(tilemap, path[i].as_ivec3(), path[j].as_ivec3()) {
-                break;
-            }
-            j -= 1;
-        }
-        result.push(path[j]);
-        i = j;
-    }
-    result
-}
-
 pub fn calculate_path_benchmarked(tilemap: &TileMap, start: IVec3, goal: IVec3) -> Vec<Vec3> {
     let timer = Instant::now();
 
@@ -882,10 +929,7 @@ fn calculate_path_with_scratchpad(
             nodes_expanded += 1;
 
             if nodes_expanded > PATHFINDER_MAX_NODES {
-                return (
+                return (Vec::new(), nodes_expanded); // force retarget
-                    reconstruct_path(&scratch.came_from, current),
-                    nodes_expanded,
-                );
             }
 
             if current == goal {
@@ -899,22 +943,6 @@ fn calculate_path_with_scratchpad(
 
             let current_g = *scratch.g_scores.get(&current).unwrap_or(&i32::MAX);
 
-            if let Some(&parent) = scratch.came_from.get(&current) {
-                if scratch.came_from.contains_key(&parent) {
-                    let gp = *scratch.came_from.get(&parent).unwrap();
-                    if line_of_sight(tilemap, gp, current) {
-                        let gp_g = *scratch.g_scores.get(&gp).unwrap_or(&i32::MAX);
-                        let via_gp = gp_g + theta_line_cost(gp, current);
-                        if via_gp < current_g {
-                            scratch.came_from.insert(current, gp);
-                            scratch.g_scores.insert(current, via_gp);
-                        }
-                    }
-                }
-            }
-
-            let current_g_updated = *scratch.g_scores.get(&current).unwrap_or(&i32::MAX);
-
             for &move_dir in &ALLOWED_MOVES {
                 let neighbor_pos = current + move_dir;
 
@@ -930,36 +958,16 @@ fn calculate_path_with_scratchpad(
                     continue;
                 }
 
-                let via_current_g = current_g_updated + movement_cost;
+                let new_g = current_g + movement_cost;
 
-                if let Some(&neighbor_parent) = scratch.came_from.get(&neighbor_pos) {
+                if new_g < *scratch.g_scores.get(&neighbor_pos).unwrap_or(&i32::MAX) {
-                    if scratch.came_from.contains_key(&neighbor_parent) {
-                        let np_g = *scratch.g_scores.get(&neighbor_parent).unwrap_or(&i32::MAX);
-                        if line_of_sight(tilemap, neighbor_parent, neighbor_pos) {
-                            let via_np_gp = np_g + theta_line_cost(neighbor_parent, neighbor_pos);
-                            if via_np_gp < via_current_g {
-                                scratch.came_from.insert(neighbor_pos, neighbor_parent);
-                                scratch.g_scores.insert(neighbor_pos, via_np_gp);
-                                let f = via_np_gp + octile_distance_3d(neighbor_pos, goal);
-                                scratch.open_set.push(PathNode {
-                                    position: neighbor_pos,
-                                    f_score: f,
-                                    g_score: via_np_gp,
-                                });
-                                continue;
-                            }
-                        }
-                    }
-                }
-
-                if via_current_g < *scratch.g_scores.get(&neighbor_pos).unwrap_or(&i32::MAX) {
                     scratch.came_from.insert(neighbor_pos, current);
-                    scratch.g_scores.insert(neighbor_pos, via_current_g);
+                    scratch.g_scores.insert(neighbor_pos, new_g);
-                    let f = via_current_g + octile_distance_3d(neighbor_pos, goal);
+                    let f = new_g + octile_distance_3d(neighbor_pos, goal);
                     scratch.open_set.push(PathNode {
                         position: neighbor_pos,
                         f_score: f,
-                        g_score: via_current_g,
+                        g_score: new_g,
                     });
                 }
             }
@@ -1021,10 +1029,7 @@ pub fn calculate_provisional_path(
             }
 
             if nodes_expanded >= node_limit {
-                return (
+                return (Vec::new(), nodes_expanded);
-                    reconstruct_path(&scratch.came_from, best_node),
-                    nodes_expanded,
-                );
             }
 
             scratch.closed_set.insert(current);

src/main.rs

@@ -11,6 +11,7 @@ mod camera;
 mod config;
 mod constants;
 mod cursor;
+mod debug;
 mod entities;
 mod game;
 mod system_info;
@@ -67,5 +68,6 @@ fn main() {
             Update,
             item_tile_management_system.after(initialize_item_rotation_state),
         )
+        .add_systems(Update, debug::entity_dump::dump_entity_positions)
         .run();
 }

src/world/generation/forestry.rs

@@ -12,8 +12,7 @@ use crate::{
     constants::{SEED, TILE_SIZE},
     world::{
         tiles::{FixtureTileData, TileMap},
-        ChunkForrestryEvent, ChunkMap, ChunkOwner, FixtureTilePrefab, TextureIDs, Textures,
+        ChunkForrestryEvent, ChunkMap, ChunkOwner, TextureIDs, Textures, VisibleGameEntity,
-        VisibleGameEntity,
     },
 };
 
@@ -72,8 +71,12 @@ pub fn generate_chunk_forrestry(
                                     continue;
                                 }
 
-                                let trunk_entity =
+                                let trunk_entity = commands
-                                    FixtureTilePrefab::log(trunk_pos).spawn(&mut commands);
+                                    .spawn((
+                                        Transform::from_translation(trunk_pos),
+                                        Visibility::Hidden,
+                                    ))
+                                    .id();
                                 tree_positions.push(trunk_pos);
                                 commands
                                     .entity(trunk_entity)
@@ -136,7 +139,6 @@ pub fn generate_chunk_forrestry(
                                             * (1.0 + (rng.random::<f32>() * 0.35 - 0.1));
 
                                         if x_f * x_f + y_f * y_f + z_f * z_f <= radius * radius {
-                                            FixtureTilePrefab::leaves(pos).spawn(&mut commands);
                                             if let Some(texture_id) = texture_ids.refs.get(&500005)
                                             {
                                                 if let Some(texture) =
@@ -166,7 +168,7 @@ pub fn generate_chunk_forrestry(
                                                         (
                                                             ivec,
                                                             FixtureTileData::new(
-                                                                5, false, true, [0; 8],
+                                                                5, true, false, [0; 8],
                                                             ),
                                                         ),
                                                     );

src/world/generation/terrain.rs

@@ -9,7 +9,7 @@ use crate::{
     constants::{SEED, TILE_SIZE},
     world::{
         tiles::{ChunkData, FloorTileData, TileMap},
-        ChunkForrestryEvent, ChunkMap, ChunkTerrainEvent, FloorTilePrefab, TileOcclusionEvent,
+        ChunkForrestryEvent, ChunkMap, ChunkTerrainEvent, TileOcclusionEvent,
         CHUNK_SIZE, Z_ABOVE, Z_BELOW,
     },
 };
@@ -47,7 +47,6 @@ pub struct TerrainBlob {
     pub chunk_data: ChunkData,
     pub tile_updates: Vec<(IVec3, FloorTileData)>,
     pub surface_positions: Vec<(Vec3, String)>,
-    pub tile_spawns: Vec<(Vec3, FloorTilePrefab)>,
 }
 
 pub fn generate_surface_terrain(x: i32, y: i32) -> f32 {
@@ -75,7 +74,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
     let mut chunk_data = ChunkData::new(chunk_pos);
     let mut tile_updates: Vec<(IVec3, FloorTileData)> = Vec::new();
     let mut surface_positions: Vec<(Vec3, String)> = Vec::new();
-    let mut tile_spawns: Vec<(Vec3, FloorTilePrefab)> = Vec::new();
 
     for local_y in 0..CHUNK_SIZE {
         for local_x in 0..CHUNK_SIZE {
@@ -107,7 +105,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                     ]);
                     if cave_value < -0.75 {
                         let tile = registry.floor("air");
-                        tile_spawns.push((position, FloorTilePrefab::air(position)));
                         tile_updates.push((
                             pos_ivec,
                             FloorTileData::new(
@@ -130,7 +127,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                         );
                     } else if cave_value < 0.8 {
                         let tile = registry.floor("rock");
-                        tile_spawns.push((position, FloorTilePrefab::rock(position)));
                         tile_updates.push((
                             pos_ivec,
                             FloorTileData::new(
@@ -153,7 +149,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                         );
                     } else {
                         let tile = registry.floor("dirt");
-                        tile_spawns.push((position, FloorTilePrefab::dirt(position)));
                         tile_updates.push((
                             pos_ivec,
                             FloorTileData::new(
@@ -178,7 +173,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                 } else if noise_position.z > position.z {
                     if surface_height <= position.z + TILE_SIZE {
                         let tile = registry.floor("grass");
-                        tile_spawns.push((position, FloorTilePrefab::grass(position)));
                         tile_updates.push((
                             pos_ivec,
                             FloorTileData::new(
@@ -202,7 +196,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                         surface_positions.push((position, "grass".to_string()));
                     } else {
                         let tile = registry.floor("dirt");
-                        tile_spawns.push((position, FloorTilePrefab::dirt(position)));
                         tile_updates.push((
                             pos_ivec,
                             FloorTileData::new(
@@ -226,7 +219,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
                     }
                 } else {
                     let tile = registry.floor("air");
-                    tile_spawns.push((position, FloorTilePrefab::air(position)));
                     tile_updates.push((
                         pos_ivec,
                         FloorTileData::new(
@@ -257,7 +249,6 @@ fn generate_terrain_blob(chunk_pos: IVec2) -> TerrainBlob {
         chunk_data,
         tile_updates,
         surface_positions,
-        tile_spawns,
     }
 }
 

src/world/mod.rs

@@ -2,8 +2,8 @@ use crate::{
     camera,
     config::{GameConfig, VsyncMode},
     world::generation::{
-        generate_chunk_fauna, generate_chunk_foliage, generate_chunk_forrestry,
+        apply_terrain_blobs, generate_chunk_fauna, generate_chunk_foliage,
-        generate_chunk_weathering_and_precipitation, apply_terrain_blobs, spawn_terrain_tasks,
+        generate_chunk_forrestry, generate_chunk_weathering_and_precipitation, spawn_terrain_tasks,
         TerrainBlobStorage,
     },
 };
@@ -16,12 +16,9 @@ pub mod tiles;
 
 pub use chunks::management::*;
 pub use textures::management::*;
-pub use tiles::{prefabs::*, rendering::*, visibility::*};
+pub use tiles::{rendering::*, visibility::*};
 
-pub fn apply_vsync_setting(
+pub fn apply_vsync_setting(config: Res<GameConfig>, mut windows: Query<&mut Window>) {
-    config: Res<GameConfig>,
-    mut windows: Query<&mut Window>,
-) {
     if config.is_changed() {
         if let Ok(mut window) = windows.single_mut() {
             window.present_mode = match config.display.vsync {

src/world/tiles/benchmark.rs

@@ -151,14 +151,10 @@ impl TilemapBenchmark {
 }
 
 /// Runs every frame — samples entity counts and frame timing.
-pub fn track_benchmark(
+pub fn track_benchmark(mut bench: ResMut<TilemapBenchmark>, time: Res<Time>) {
-    mut bench: ResMut<TilemapBenchmark>,
-    time: Res<Time>,
-    floor_tiles: Query<(), With<super::FloorTile>>,
-) {
     bench.frame_count += 1;
     bench.frame_times.push(time.delta());
-    bench.floor_tile_count = floor_tiles.iter().count() as u32;
+    bench.floor_tile_count = 0;
 
     // Trim rolling window to last 300 frames for p99 calculation
     if bench.frame_times.len() > 300 {

src/world/tiles/mod.rs

@@ -1,7 +1,5 @@
 pub mod benchmark;
 pub mod chunk_data;
-pub mod components;
-pub mod prefabs;
 pub mod rendering;
 pub mod tilemap;
 pub mod tilemap_chunk;
@@ -9,8 +7,6 @@ pub mod visibility;
 
 pub use benchmark::*;
 pub use chunk_data::*;
-pub use components::*;
-pub use prefabs::*;
 pub use tilemap::*;
 pub use tilemap_chunk::*;
 pub use visibility::*;

src/world/tiles/prefabs.rs

@@ -1,195 +1,4 @@
-use bevy::prelude::*;
+// Prefab types (FloorTilePrefab, FixtureTilePrefab) were deleted — they were
-
+// entirely dead code. FloorTile and FixtureTile ECS components (in the former
-use crate::{
+// components.rs) were also never read. The TileMap + ChunkData bitsets are the
-    config::TileRegistry,
+// sole source of truth for standability.
-    world::{
-        tiles::{FixtureTile, FloorTile, TileState},
-        FIXTURE_ID_OFFSET,
-    },
-};
-
-#[derive(Bundle)]
-pub struct FloorTilePrefab {
-    transform: Transform,
-    tile: FloorTile,
-    tile_state: TileState,
-    visibility: Visibility,
-}
-
-impl FloorTilePrefab {
-    pub fn grass(position: Vec3) -> Self {
-        let def = TileRegistry::global().floor("grass");
-        FloorTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FloorTile {
-                id: def.id as u32,
-                opaque: !def.transparent,
-                walkable: def.can_stand_on,
-                astar_weight: def.astar_weight,
-                visible_range: [0; 8],
-            },
-            tile_state: TileState {
-                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn dirt(position: Vec3) -> Self {
-        let def = TileRegistry::global().floor("dirt");
-        FloorTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FloorTile {
-                id: def.id as u32,
-                opaque: !def.transparent,
-                walkable: def.can_stand_on,
-                astar_weight: def.astar_weight,
-                visible_range: [0; 8],
-            },
-            tile_state: TileState {
-                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn rock(position: Vec3) -> Self {
-        let def = TileRegistry::global().floor("rock");
-        FloorTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FloorTile {
-                id: def.id as u32,
-                opaque: !def.transparent,
-                walkable: def.can_stand_on,
-                astar_weight: def.astar_weight,
-                visible_range: [0; 8],
-            },
-            tile_state: TileState {
-                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn air(position: Vec3) -> Self {
-        let def = TileRegistry::global().floor("air");
-        FloorTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FloorTile {
-                id: def.id as u32,
-                opaque: !def.transparent,
-                walkable: def.can_stand_on,
-                astar_weight: def.astar_weight,
-                visible_range: [0; 8],
-            },
-            tile_state: TileState {
-                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn bedrock(position: Vec3) -> Self {
-        let def = TileRegistry::global().floor("bedrock");
-        FloorTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FloorTile {
-                id: def.id as u32,
-                opaque: !def.transparent,
-                walkable: def.can_stand_on,
-                astar_weight: def.astar_weight,
-                visible_range: [0; 8],
-            },
-            tile_state: TileState {
-                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn spawn(self, commands: &mut Commands) -> Entity {
-        commands
-            .spawn((self.tile, self.transform, self.tile_state, self.visibility))
-            .id()
-    }
-}
-
-#[derive(Bundle)]
-pub struct FixtureTilePrefab {
-    transform: Transform,
-    tile: FixtureTile,
-    visibility: Visibility,
-}
-
-impl FixtureTilePrefab {
-    pub fn dirt_wall(position: Vec3) -> Self {
-        let def = TileRegistry::global().fixture("dirt_wall");
-        FixtureTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FixtureTile {
-                id: FIXTURE_ID_OFFSET + def.id,
-                solid: def.solid,
-                visible_range: [0; 8],
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn rock_wall(position: Vec3) -> Self {
-        let def = TileRegistry::global().fixture("rock_wall");
-        FixtureTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FixtureTile {
-                id: FIXTURE_ID_OFFSET + def.id,
-                solid: def.solid,
-                visible_range: [0; 8],
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn log(position: Vec3) -> Self {
-        let def = TileRegistry::global().fixture("log");
-        FixtureTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FixtureTile {
-                id: FIXTURE_ID_OFFSET + def.id,
-                solid: def.solid,
-                visible_range: [0; 8],
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn leaves(position: Vec3) -> Self {
-        let def = TileRegistry::global().fixture("leaves");
-        FixtureTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FixtureTile {
-                id: FIXTURE_ID_OFFSET + def.id,
-                solid: def.solid,
-                visible_range: [0; 8],
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn bedrock_wall(position: Vec3) -> Self {
-        let def = TileRegistry::global().fixture("bedrock_wall");
-        FixtureTilePrefab {
-            transform: Transform::from_translation(position),
-            tile: FixtureTile {
-                id: FIXTURE_ID_OFFSET + def.id,
-                solid: def.solid,
-                visible_range: [0; 8],
-            },
-            visibility: Visibility::Hidden,
-        }
-    }
-
-    pub fn spawn(self, commands: &mut Commands) -> Entity {
-        commands
-            .spawn((self.tile, self.transform, self.visibility))
-            .id()
-    }
-}

src/world/tiles/tilemap.rs

@@ -237,6 +237,24 @@ impl TileMap {
             .unwrap_or(100)
     }
 
+    /// Remove a fixture tile, clearing both the HashMap entry and ChunkData bitsets.
+    /// BOTH must be cleared — leaving ChunkData stale causes is_standable bugs.
+    pub fn remove_fixture(&mut self, pos: &IVec3) -> Option<FixtureTileData> {
+        use super::chunk_data::ChunkData;
+
+        let removed = self.fixture_tiles.remove(pos);
+        let chunk_pos = world_to_chunk(*pos);
+        if let Some(chunk) = self.chunks.get_mut(&chunk_pos) {
+            let (lx, ly, z) = ChunkData::world_to_local(*pos);
+            let idx = ChunkData::pos_to_index(lx, ly, z);
+            let word = idx / 32;
+            let clear_mask = !(1u32 << (idx % 32));
+            chunk.stand_in_fixture[word] &= clear_mask;
+            chunk.stand_on_fixture[word] &= clear_mask;
+        }
+        removed
+    }
+
     /// Remove all tile data for a specific chunk from the TileMap.
     /// Iterates all positions in the chunk volume and removes from HashMaps.
     /// Used during chunk unloading to clean up tile data.

src/world/tiles/tilemap_chunk.rs

@@ -280,7 +280,7 @@ pub fn spawn_tilemap_chunks(
         let half_chunk = (CHUNK_SIZE_TILE as f32) / 2.0 - TILE_SIZE / 2.0;
         let world_x = (key.chunk_pos.x as f32) * (CHUNK_SIZE_TILE as f32) + half_chunk;
         let world_y = (key.chunk_pos.y as f32) * (CHUNK_SIZE_TILE as f32) + half_chunk;
-        let z_depth = -(Z_BELOW - key.z_index as f32) * TILE_SIZE;
+        let z_depth = (key.z_index as f32 - Z_BELOW) * TILE_SIZE;
 
         let visible = z_diff >= 0 && z_diff <= 8;