Black Frame Buffer CUDA/RTX

[eike_maas]

I have been trying to switch from CPU rendering to CUDA or RTX on my gpu, in VRay for Rhino. Problem is... I get a black frame buffer every time.

A few other threads on the topic mentioned changing NVidia/Windows settings to allow hardware acceleration, and changing the power management mode to "prefer maximum performance". Both of these are done, but still black.

I'll attach photos of the frame buffer with CPU (full color), RTX (black), and my system specs and my rendering settings in VRay. I've also gotten an error sometimes that says something about cannot allocate 3,500ish Mb to frame buffer or something. I do have a 4Gb graphics card, though, so this should be fine, no? Could that be the whole problem?

Any help is greatly appreciated. I feel like I've flipped every switch and setting I could, including the ones I don't understand, and I'm out of ideas...

Thank you.

[eike_maas]

Bumping thread

[Muhammed_Hamed]

Hey eike_maas and welcome to the forums!

The error you see is about running out of GPU memory, V-Ray GPU needs 3 GB more memory to render this scene
What you can do is use Compressed Textures Mode, and stick to CUDA engine and Progressive mode. This will reduce GPU memory usage quite a lot to hopefully fit in your GPU memory. Let me know if this helps

Other than that, we plan on adding an option soon to V-Ray for Sketchup/Rhino that allows using the system memory for GPU rendering. This is coming very soon. You can read about this option here
And here is a link to my guide on optimizing GPU memory, keep in mind that the GTX 1650 4 GB is a low-end GPU that is almost 6 years old. Something like the RTX 4060ti 16 GB has a lot more VRAM and performance, and is quite affordable at 400 euros

Sorry for replying late, most of the staff were off during Easter in Europe

Best,
Muhammed