Painting in the assembly room and I have never gotten along. Works fine on objects with 1 shader domain. But I can take the brick model  in to Genetica and paint textures on it there. Thing is the displacement maps I make in Genetica are a bit high contrast for carrara so I have to find low settings that work; some times the lowest isn't low enough. Dropping the brightness of the map helps but loses small details.

Yesterday I got obsessed with that floor texture and ended up spending the day going through 58 builds to get something reasonable. Had to abandon the gravel in it because it just made the texture too complex for the bump; but I can always add it with the complex shader mixer. I have one more layer of weathering to add to the brick floor, and I don't want to over work the individual brick texture/displacement map. That looks ok and I am afraid I'd only make it worse lol