When I convert my character's materials from Traditional to PBR shader models I end up with diffuse, opacity, normal, roughness, and metallic texture maps - HOWEVER the box for Ambient Occlusion (AO) remains blank. Is there a way to automatically generate AO texture maps?

I can see there's a way to enable AO in the "Visual" window of CC, but that doesn't seem to affect the character's texture maps.

I can't seem to find any useful info on this.

Any help?