Mirko Jankovic

No problems with nvidia on linux, actualy in some cases it renders twice as fast as on windows. No exaggeration. Depending on project I can see speed up in XPU rendering, from 10% to even twice as fast.

Again unless you need more then 32GB of ram for your renders you wont see any speed up in rendering at all, it can even be slower.
It mostly comes to CUDA cores, 5090 got 21K and A6000 only 10K.

Don’t waste money on an RTX Pro unless you really need that much VRAM. It won’t be any faster than a 5090 or even a 4090. And for the price of one RTX Pro, you could probably get two 5090s.

Unless you specifically need 64 GB of VRAM for your renders, it’s basically a waste of money.

As for the number of GPUs, it always depends on what you’re rendering and how fast you need the results. For my work, 6×4090 across three machines is more than enough — but it never hurts to have more, as long as the return justifies the investment.

"All you need is a Grid to catch the Shadows, an Environment image (eg. HDRI) to cast the rays and Objects you want to cast Shadows from."

Just to check, catcher can only be grid or it can be any other object in the scene as well?
I mean wording seems a bit exclusive to grid so figured to check.