V-Ray GPU RTX Optix Rendering is now broken

V-Ray for SketchUp V-Ray for SketchUp :: Issues
1

Not sure what has changed in the recent update, but now I cannot use RTX Optix rendering on my existing SKP files that were all rendered with RTX originally. Nothing else has changed. RTX 5090 laptop. RTX mode works fine in my other V-Ray application (V-Ray for FormZ), so I can confirm it is not a hardware or driver issue. Currently still using the recommended Studio Driver 581.57.

CUDA GPU mode works as expected. Only RTX Optix mode is broken. It gives me this error message after starting a rendering and then failing after a initial passes.

		5/4/2026 10:09:42 AM
		Error
		\[V-Ray] \[VUtils::VOptix::OptixPipelineWrapper::launch] 7900: OptiX error encountered in vray\_optix7.cpp\[309]. Error Code 7900


		5/4/2026 10:09:42 AM
		Error
		\[V-Ray] \[VUtils::VOptix::OptixPipelineWrapper::launch] 7900: OptiX error encountered in vray\_optix7.cpp\[309]. Error Code 7900


		5/4/2026 10:09:42 AM
		Error
		\[V-Ray] C:\GitLab\builds\V8fLbpDxG\0\aec\appsdk-builder\cgrepo\vraysdk\\(2084) : CUDA error 700


		5/4/2026 10:09:42 AM
		Error
		\[V-Ray] \[MemoryManagerGpu::releaseUnmappedMemoryFromInstanc e] 700: Could not release device buffer

Please help! I tried the most recent V-Ray update 7.30.01. Broken RTX mode.

2

Hi @jymontoya ,

I’m sorry to hear you’re experiencing this issue. We’ll do our best to resolve it quickly.

Is it possible to share the project file (skp + external assets) so that we can debug on our side?
To do this you can either open a support ticket or send me a DM with a download link.

Thank you in advance,
Konstantin

3

Thank you, I have uninstalled V-Ray 7.3 and gone back to 7.20.02 and everything is working again as it should. There is definitely a problem with RTX rendering engine on 7.3 for me.

Working through a support ticket as well, just updating here for completeness.