thx for answer, the problem is not the state and the wall destroy, this works fine.
in your picture you have splats (in the broken part) but they only are in WB not ingame. my question is how is it possible to show these automaticly generated splats ingame.
at this time i have fixed it with normal manualy placed splats. (if you have a empty map and place only one wall like in your picture you can show the used splats in the splats tool (green selected like used)) and add them manualy...
how can i get the broken wall-parts (in a damaged spline)into the game as i can see in the worldbuilder (with the autogenerated splats and broken parts)?