I am currently working with ArcMap. I have a contour layer (polyline) and I'm trying to add building (polyline or polygon) and vegetation (polyline or polygon) heights to the elevations on the contour layer in order complete a viewshed analysis for a river corridor. I can't seem to figure out how to add these layers together to give me a more accurate landscape model. Everything I have read suggests that I need ArcScene or 3D Analyst. Is there any other way to do what I need to without forking over the thousands of dollars for either of these programs??