Problems after changing from directx11 to directx12 in VR

Hi, I have project for VR with scans. Originally it was in directx 12 and it worked fine but I was asked to build it for directx 11. It had awful shading and I tried to change it back but scene with scans became blue and white only for right eye. Sadly, I cant get a screenshot. Is there some setting that could change. It works fine on PC and for left eye. Also can you suggest any tips for optimization for VR, it is my first project in VR for unreal and person asked to use scans. Thank you