My DEM is a 3mb .img. My 2 multipatch layers are 'open' multipatch as my roof, walls and footprints are separate. Are one my 'formats' wrong? My 'profile line' is a 2d line, should it be a 3D line? The profile line is only covering about 9 buildings! Is it supposed to take 'forever'? The 'executing Stack Profile' progress bar just runs for hours before I crash it. I am running it in ArcScene. Can't find any guidance in the help. Anyone got any tips? This could be helpful to our Urban Planning staff.