UCX collision is working but not completely visible

UCX files imported from blender

Why are there so many convex elements? 1 to 3 is usually enough. Do you really have 22 UCX entries in your Blender file?

Those X’s are usually a sign that there’s overlapping polygons. Even if they were split that way, it’s a waste for collision geometry. I’d re-export from Blender. Use FBX 2028 or something and hit the re-import button.

Well. Yes i have 22 UCX. I split this mesh to faces. I couldnt find optimal way to make collision for this mesh. Its a room and I need nearly same collision as mesh but without using complex collision

Instead of planes i used cubes and now it works fine