I was searching, and command line rendering is working, but not on GPU. I also find something with custom python script to force it to GPU, but it doesn't work either, probably because of Blender version. I have a really huge scene, which randomly gives Me "out of memory" error, but when I reset Blender it renders, sadly this will not work for Me, to re-run the rendering all the time.
I need help in launching Blender from command line with GPU rendering. Also it need to be OPTIX, because is a lot faster on RTX cards. I don't know python, can someone help Me run it for Blender 2.91? It need to be 2.91 from builder.blender.org, because it has crucial VDB bug repaired, and I'm using VDB sequence.