Good morning, Kirgman.

A small bug report, which is possibly not caused by the render engine, but rather by the Nvidia drivers. I believe the error lies with the drivers.

The issue is that using version 0.708, Centileo is very stable while using the IPR. However, when switching to version 0.712, in a specific scene, Cinema 4D crashes and the IPR freezes, generating artifacts in the image (similar to when, in images larger than 4096x4096, half the image appeared with lines).

This leads me to believe that it happens when displaying emissive materials in the IPR, but since this is difficult to verify (because sometimes it doesn't fail), I wanted to mention that in the materials panel, the emissive materials appear black, regardless of whether the emission is a color or a texture.

If you revert to version 0.708 and open the scene, rendering the material again displays correctly. This is the bug I'm referring to.

Regards.