TileMap Mastery

TileMapLayer grids, TileSet atlases, terrain autotiling, and custom data define efficient 2D level systems.

Available Scripts

tilemap_data_manager.gd

Expert TileMap serialization and chunking manager for large worlds.

NEVER Do in TileMaps

• NEVER use set_cell() in loops without batching — 1000 tiles × set_cell() = 1000 individual function calls = slow. Use set_cells_terrain_connect() for bulk OR cache changes, apply once.
• NEVER forget source_id parameter — set_cell(pos, atlas_coords) without source_id? Wrong overload = crash OR silent failure. Use set_cell(pos, source_id, atlas_coords).
• NEVER mix tile coordinates with world coordinates — set_cell(mouse_position) without local_to_map()? Wrong grid position. ALWAYS convert: local_to_map(global_pos).
• NEVER skip terrain set configuration — Manual tile assignment for organic shapes? 100+ tiles for grass patch. Use set_cells_terrain_connect() with terrain sets for autotiling.
• NEVER use TileMap for dynamic entities — Enemies/pickups as tiles? No signals, physics, scripts. Use Node2D/CharacterBody2D, reserve TileMap for static/destructible geometry.
• NEVER query get_cell_tile_data() in _physics_process — Every frame tile data lookup? Performance tank. Cache tile data in dictionary: tile_cache[pos] = get_cell_tile_data(pos).