Useful code that helps to bake PBR into 1 Texture to save performance on samples. Also added code that rebuilds Normal Map from RG (procedural B)
https://dev.epicgames.com/community/learning/tutorials/qpMV/unreal-engine-epic-for-indies-channel-packing-save-performance-vram-by-combining-pbr-into-single-texture-and-more