Yeah, that’s what I thought. I dropped it into another project and built lighting and same thing, it’s really dark… Not as bad, but still not good.
I combined my Rougness, Metallic and AO into a single TGA file to save memory and use that in the material. Roughness in the red channel, metallic in green and ao in blue… I’ve been using this method for years without issue. It looks mostly fine in the UE4 mesh viewer. It’s only when I drop it into a scene that it goes completely dark.
My material isn’t really complex either. Just the diffuse, normal, RMAO, Emissive and a color mask switch.
