Blotchy shadows/ GI/ Reflections when using Shadow catcher setup

V-Ray V-Ray for 3ds Max Issues
1

Hi,

I’m wondering if anybody has a solution to the issue I’m facing when using a shadow catcher setup (made via VRayProperties)

As soon as I set the plane to be a shadow catcher object I get blotchy artifacts around their base. I can’t seem to smooth this out with a higher AA/ Lower noise threshold or by increasing LC subdivisions.

Images attached to show the issue.

Thank you

When using shadow catcher - white solid placed underneath original render..jpg
When using shadow catcher - white solid placed underneath original render..jpg1046×183 28.8 KB

No shadow catcher.jpg
No shadow catcher.jpg1046×183 28.6 KB

2

Setting my LC subdivs to 10,000 and Retrace to 12 cleaned this up

3

I believe that Retrace option should be enough to smooth those blotches, can you try to decrease LC subdivs to something like 3000 and keep Retrace to 12?