adosity posted at 4:40 PM Fri, 22 October 2021 - #4429266

Trying to render with Optix:GPU on an RTX 3070 Ti gives nothing but failed renders. After a few seconds of 'Loading render kernals' it briefly flashes what seems to say a COMPILE_ERROR but it doesn't output this to the Log screen so it's difficult to give the full version of the error code. It even fails to render a basic scene consisting of only the Construct and one of the default Poser Superfly Lights sets. No figures or shapes. Odd thing is, it worked once or twice after installing the latest version, even on more complex scenes, but for whatever reason it hasn't since. Clearing the Optix cache in Appdata\Nvidia hasn't changed anything.

Non-Optix GPU renders work fine.

I have a ticked filed at the support  that concerns the weird crashes in RTX mode. That doesn't depend on your card because I've an old RTX2080Ti. It seems that it's deeply hiding in the Cycles engine when it's related to the RTX mode.
I know that they have enrolled a Cycles expert, and they count on his expertise to enhance and correct those hiding bugs...

From what I've obsersed:

* Cycles needs Unimesh
* Some hair props seem to make the RTX render crash, even recent ones
* Sometimes, upscaling or moving the hair prop seem to correct the problem, but it's not always the case
* it looks like sometimes when two objects are intersecting, it crashes, sometimes  not

𝒫𝒽𝓎𝓁

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