Any Refraction IOR value except 1.0 creates black artifacts

[jrz371]

Tested with RadeonProRenderSDK 2.02.2, also reproducible in the Blender addon

Using any refraction IOR value except 1.0 creates these black rendering artifacts appearing within the object.

[jrz371]

Here's an example made in Blender 2.91 IOR bug Blender.zip

[SimonDanisch]

Did you try setting RPR_CONTEXT_MAX_RECURSION to e.g. 10?

[jrz371]

Yes, we use 8 as a default and even at 10 there is no discernable difference.