Same here, good to know I’m not the only one.
Seems to be a driver problem, I’ve also collected some more problems with unreal and submitted it to the developer forum because it’s monitored by mods I’m hoping someone will pick up on it faster.
https://community.amd.com/t5/newcomers-start-here/serious-issues-in-unreal-engine-on-rx-7900xt/m-p/5...
I’ve also done some more digging and it looks like hardware raytracing has been broken since at least December:
https://forums.unrealengine.com/t/what-is-the-setting-for-unreal-engine-5-1-with-amd-radeon-gpu-rx69...
I’ve submitted a bug report with the AMD bug report tool for the vulkan crash because that’s clearly an AMD bug.
My theory is that no matter how bas DX12 SM6.6 is, vulkan in theory should just work for Nanite stuff because amd supports VK_KHR_shader_atomic_int64 so getting vulkan to function would be at least a partial solution until they figure out DX12.
But honestly seeing hwrt being broken for a while I wouldn’t be too optimistic.
I also couldn’t reproduce anything on that list on Nvidia and it’s just soo frustrating.