Another approach try to make PBR look stylish. Not the photo-realistic real. But feel cartoon-y but also touchable like your miniature model from your good old days tabletop game. Step away from realistic to let some space for imaginations!
what you see here is not generated from any models or grayscale of the painted color. But I paint the normal for each direction and combine them together. Hope it will react to light and make those light diffuse as it were painted.
I'm not sure if this workflow are perfect or not. So I make it free and let you guys decide. Please comment about this and I'll make sure it will got updates of improvements and also another material release after the workflow and the output quality are perfect.