We are unable to render our project with MRG path tracing in Unreal 5.6 on GPUs with 24G of VRAM, while rendering in 5.5 works fine. We have had some success rendering on 5090 RTX cards that have 32G of VRAM.
Has anything changed with memory consumption in path tracer? It seems our scenes even with grooms disabled are running much more memory. In this case there is a 800mb difference in the same scene rendered in 5.6 vs 5.5. I have been unable to do this test with grooms enabled, as the 5.5 scene is already over 22GB with grooms and fails to render more than 1 frame in 5.6 on my local machine. I’m trying to test on a 5090 to get better numbers.