Hello again, Kirgman.

I've encountered a new problem. In this case, it refers to the "importance sampling" of an emissive material.

I've attached a video captured from my scene.

The thing is, with conventional lighting, it works without a problem, and I can orbit the camera without the IPR failing.

Afterwards, I turn off the conventional lights and increase the power of an emissive material.

On occasion, the IPR has stopped working, but I'm not going to use it in that mode without activating "importance sampling."

The problem arises when I activate "importance sampling." Usually, on the second or third camera orbit, the IPR crashes, and when I close it, Cinema 4D freezes.

Regards.
Vídeo