diff --git a/src/entities/livestock/rabbit.rs b/src/entities/livestock/rabbit.rs
index d94e3ce..521e311 100644
--- a/src/entities/livestock/rabbit.rs
+++ b/src/entities/livestock/rabbit.rs
@@ -134,14 +134,15 @@ pub fn rabbit_dig_system(
         if tilemap.remove_floor(&below_pos).is_some() {
             tile_changed.write(TileChangedEvent { pos: below_pos });
 
-            // Refresh visibility for the dug tile and all 26 neighbours.
-            // Removing a tile changes what is visible from every adjacent position.
-            for dz in -1..=1i32 {
+            // Refresh the full column below the dig and its XY neighbours.
+            // calculate_visibility traces up to Z_TOTAL+Z_BELOW+1 tiles above each tile,
+            // so removing one tile can affect visibility arbitrarily deep below.
+            for dz in 0..=crate::world::chunks::Z_BELOW as i32 {
                 for dy in -1..=1i32 {
                     for dx in -1..=1i32 {
                         occlusion.write(TileOcclusionEvent {
                             tile_position: below_pos
-                                + IVec3::new(dx * ITILE_SIZE, dy * ITILE_SIZE, dz * ITILE_SIZE),
+                                - IVec3::new(dx * ITILE_SIZE, dy * ITILE_SIZE, dz * ITILE_SIZE),
                         });
                     }
                 }
diff --git a/src/world/tiles/visibility.rs b/src/world/tiles/visibility.rs
index e7d30a7..229f39f 100644
--- a/src/world/tiles/visibility.rs
+++ b/src/world/tiles/visibility.rs
@@ -144,7 +144,8 @@ pub fn calculate_visibility(pos: IVec3, tilemap: &TileMap) -> [u32; 8] {
                     );
                     match tilemap.floor_tiles.get(&neighbor_pos) {
                         Some(tile) if tile.id == 0 => break 'neighbor_check true,
-                        None => {}
+                        // Absent tile means open space — treat as air for visibility.
+                        None => break 'neighbor_check true,
                         _ => {}
                     }
                 }