Hi Rhuarc,
I also thought that it has something to do with ZEnable/ZWriteEnable, I was playing around with those settings for hours.
Ive found another problem that maybe is related to the disapearing door problem.


At this picture I can see trough the glass and im able to see both door handles.



At this picture, the door handle on the other side of the door isnt visible.



Note that is the same model with the same shader only from a diffrent view. Its the same thing in 3dgs. Sometimes I can see both door handles and sometimes not, however it has something to do with the camera view on the model.

any ideas?

cheers

Zwecklos