Reflections in ID bug

So I’ve been trying to set this up but I ran into two issues. One it doesn’t work at all with some imported CAD models(which I cant share), but CAD models are often odd so it’s something I’ve got to live with.
The second one is a phantom disc appearing seemingly random. I recreated the problem with a sphere with some holes punched in it and a cube catching reflections. As I change the difuse color closer to white at some point a disc occluding the reflections appears.

Corona 6RC2
R18


reflections in ID.c4d (570 KB)

Hi, thanks for the file. That’s pretty strange and I’m not entirely sure what is going on here so we will need to investigate further.

For internal use: (Internal ID=547634112)