Hey Chuck, OBJ works just as well for texturing. My workflow often includes animation data, so I tend to stick to FBX, but for just painting on an object it really doesn’t matter.
I prefer to bake AO in Blender first, but some people bake AO in Substance. It’s another one of those personal preference things – whichever gives you the best result. You should do it every time, since many of Substance’s smart materials will base some of their calculations on the AO map.
I select Unity since I’m working with Unity, but if you’re not then PBR Metallic Roughness will work fine👍
