Autogen Density-Overlaying Rectangles?

Since you are the resident expert on Autogen there is a nagging question. Does overlaying multiple vegitation rectangles increase the density of the items as compared to a single rectangle covering the same area?
Dick Boley

PS: Thanks for the latest version.
I guess I'm not that much of an expert in that regard cause I have no clue as to the answer. My guess is that some of the guys at the VFR autogen site would have the answers to that one.