So, I am seeing the problem again, please see attached pictures.
The first picture shows that two walls have these interfering effects (one wall is new, the other wall has been copied from another level).
Second picture shows the other two walls, which have no interfering effects (one wall new, the other copied from another level).
One of the walls with interfering has no texture at all, the other got is from the copy action.
I have attached the sh3d-file as requested. Hope somebody can help.
http://www.mediafire.com/file/yn7h4xyw8t11f1c...ring_textures_2.sh3d/file
