Hi,

As not expert, I tested SP to be curious with your file.
Each style in MOI became a texture in SP.
Then I was able to paint each texture in SP.

Death, have you exported in .obj format ?

The texture is repeated on each face attached with a texture.
Here we see your 2 windows have the same texture (named green in SP because named green in Moi).
Same problem (if this is a problem for your needs) you have same texture on each face of your wall.
So if you don't want same texture on each surface of a single object, you must separate the surface of your objects in MOI and give them different styles (MOI's Styles)





It helped ?

If no, sorry...