Walls not showing in game

[Mudbill]

The .map_cache file is like a duplicate of your level that the game uses to load the level faster. But once it's generated, it's not dynamically updated with the level, so any changes you do to it will not be in the .map_cache file. Since the game loads the cache file first (if there is one), the changes will not appear.

So remember to delete the cache if you do any changes. Its purpose is to load the game faster.