How to get GPU + CPU CUDA rendering going on Standalone?

[paulinventome]

So i am writing out vrscene files from VRay Nuke and taking them to another machine where i have a render node running. I want to just leave the machine running and i can get GPU rendering going fine, but i cannot work out how to get CUDA GPU+CPU at the same time. There is no option in VRay Nuke for this. I can select RtEngine but no hybrid option.

Also would CPU+GPU CUDA be faster than RTX with a 2070 Super card?

Any docs or pointers really appreciated
cheers
Paul

[hermit.crab]

Either use the GPU Device Select tool ("C:\Program Files\Nuke12.1v3\plugins\vray_gpu_device_select.ex e") or manually set this Windows environment variable:

VRAY_GPU_PLATFORMS=c++/cpu;nvidia

Use the -rtengine=5/7 command as well for respectively CUDA or RTX rendering.