making AO,metalness,roughness,specular without substance painter?

focus_method

Hello,

i have a hard surface 3d model made in zbrush,  and i have color map, cavity map, normal map,displacement map.
How can i make metalness map, roughness map, specular map, AO map ? 
is there any way to do it in photoshop? or maybe xnormal?

Alex_J

sure it's just a black and white map. You can make it in paint if you want. 

AO map is usually baked, so whatever software offers baking can do that.