As an FYI, render still in progress...but lowering the RT cache to zero and the IDL cache to 50, increasing the pixel samples from 3 to 5, changing to box, and lowering the exp from 2.2 to 1.8 and I am seeing the issue where the two walls meet in the upper right hand corner as reported by others. Whereas before I didn't see those. On the surface it appears one of those changes invokes the dirty corners where 2 walls meet.

I did move the camera a couple of degrees also to remove the open area in the very upper right, The walls of the changing room are shorter then the walls that surround the entire scene and it looked odd to me.

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"