This was a test with the 3dsmax script multiscatter and viewport canvas. the idea was to paint on terrain and use this as a base to scatter objects.
mixed area in max viewport with baked to vertexcolor
mixed area setup
forest in max viewport with ao baked to vertexcolor
forest setup
meadow in max viewport with baked ao to vertexcolor
meadow in max viewport with baked to ao vertexcolor
meadow setup
the most awsome UI ever