Quote - If we made a skin texture that was painted in the style of painters,like Boris ,Royo etc etc.
Had a painted sky background.
Had painted textured buildings.
Wouldn't that make the render look painted ?
Wouldn't that work ?

I don't think that the render would look painted, just the figure. However, that method has some potential for surreal effect - check out the film Mirrormask. I remember Dave McKean giving a talk about it at the showing I went to in Brighton - he painted the textures that were used on the 3D creatures in the film.