This is in KeyShot. I have a problem — my render has a close-up camera angle. It’s an animation, with a flat light moving in a circular path, as well as a spotlight. I need two highlights on the object in the animation, but these highlights look like water droplets with fractal patterns.
tried using the firefly filter with different values from 0 to 1, and also increased the render time. I experimented with enabling and disabling caustics, although I feel caustics aren’t necessary in this case. I also tried toggling denoising on and off.
I figured something out: in the renders where the light highlights looked low-quality, I was using GPU rendering. But in the render where the highlight looked clean, I used CPU rendering.
I have an A5000 graphics card and a 12th Gen Intel® Core™ i7-12700K @ 3.60 GHz processor, with 64 GB of RAM.
I really wonder what causes this. I’ve not really any clue also why I didn’t have an answer on the #1 question.
If it’s possible I can take a look if you’re able to share the troubled part of your scene. You can share it with wetransfer.com for example and send me a direct message. My CPU is an oldie i9-9900K so I rarely render anything on CPU and think that’s also the reason I won’t notice differences between them but how it looks using GPU looks bad and maybe there’s a way to fix it by changing the material a bit. Would be happy to try.
I understand, thought maybe with just the trouble parts it could be ok. I was also thinking a bit if it might be a layer of glass+plastic on top of a plastic material without enough space since it appears a bit like z-fighting between two items. Would still be odd you only get it with GPU but maybe it’s bit less precise and that’s why you notice it. Hard to tell.
