Vray 3.4 for Rhino - Black circles issues in render

I’m using Vray 3.4 for Rhino and recently I’ve been facing an issue with renders.

Black circles appears on different surfaces (Wall, Glass, Wood, Metal) please note that I have no overlapping geometries and I use the same settings for the past 3 months and never faced something like this.

I would appreciate a prompt response that guides me to a solution.

Thank you

I think it might be a vray bug…does changing slightly camera angle solves the issue? Also you can try force back face culling in vray settings.

Also update to V-Ray 3.6 in case Lukasz is right and the bug has already been solved.

You might want to try revert to default settings.

Can you show us a screenshot of your problem?