Rendered shadow bug in reflection (Mental ray arch & design)

[Anonymous]

Hello all,

I have a really weird problem and I cannot wrap my head around it.
When rendering the full view, I get strange results in the window reflection.
The jonction of the wall and ceiling is black, totally cutout.
There are also weird darker lines, like weird shadows.

What's even weirder is that when only rendering this section (from the same camera and settings) It renders with a different lighting, but also correctly.
The weird issues I have with the view renderer are not present.
***See joined file***

Since this is for a video, I can make a fix frame by frame!

Could someone explain?

I am using Max 2014 and mental ray.

[Anonymous]

Bump!!