PBR Texture Maps

Hi, I can’t seem to find much info on PBR materials - ideally I want to use “albedo, ORM, Normal” maps - and i’m connecting my occ/rough/metal texture map into the “metallic roughness map” but not sure it’s working correctly, and can’t seem to find any specific reference to what kind of map this expects.

There is also the “metalness” as well as “roughness map” and values - am I correct in thinking if a map is used in any slot, the corresponding value is ignored? and would using the “metallic roughness map” then ignore both the separate metallic and roughness maps and values?

image

I was also using UDIM UV tiling, which I assume isn’t supported? When using the UV’s tiled across, it looked like it was picking up the albedo correctly, but not the other maps? When I put them back to 1,1 it appears to work better. Is there support for tiling uv’s?