Hi,
I creat a small level. A floor with a lot of doors The floor is absolute symetricly.
Here are some pictures:

In WED:

engine:


Why are the right doors dark? They have the same settings like the left doors. They are copied and pasted. They fit exactly into their door borders.
Can someone explain the strange behaviour.
ps.: It is a Block level, the doors are mdls
MfG
Patrick