Painting side surface of topography

[Maciej_Musialek]

So, I've made topography, cut it with building pad, and have those sides between topography and building pad, which I want to paint or attach material to (see picture). And can't find tool to do it. Blue arrow points surface to be painted, but I don't want to change surface pointed by red arrow.

[loboarch]

The "sides" of a toposurface are a bit unique.  They only show once a toposurface is cut, so they are kind of both there and not there at the same time, so technically there is not a surface there to use the paint tool on.  In the "real world" there would probably be some kind of retiaining wall there to hold the earth and that would provide a surface to paint if it is modeled.

[marcellojs]

did you attach the image? I dont see it. Also the "sides" (all four) of the topo once cut from the building pad have always aquired the same material as the topo surface. does your image show it differently? or did you want to apply a DIFFERENT material to those 4 sides?