Containers critters etc don't appear

Hi!
I'm stuck with creating containers.
I've started to build a map, but when i try to put a chest (container) object or a critter it just appear in the WorldEd, but in the game it doesn't there. The tutorial says i have to edit it's Art but it doesn't help me too. Could somebody help me out?
Thank You!

 

Welcome to the forum, zotykapotyka!

The solution to your problem is simple enough - After you make your additions and before you start the game, go to your Arcanum\modules\Arcanum\maps folder and you'll find 80 or more oddly-named files with no extentions. Delete these files.
This forces the game engine to take a fresh inventory of what's there; thus allowing new critters and chests to be seen.