CompuServe Messages

James, In response to your inquiry: We know from our design/architectual backgrounds that all people (with certain exceptions) in a perspective scene will have their heads or eyes at roughly the 5'6" imaginary horizontal line. If some people are scaled up or down, their heads must still remain at that invisible 5'6" line. Grade changes must be accounted for and applied accordingly. That puts people in perspective, but still does not correct angle situations. If we have a large selection of different images to choose from, we can pick the most closely matched person or image that will fit into the scene (i.e. position, lighting, etc.). Another, more time consuming way, is to actually have these images mapped on invisible rectangles and then positioned as actual 3-D objects in the scene. This requires having the same image as an all-white image mapped with the actual photo. Its more time costly I think, but it is more acurate. if you use ray-traced shadows, you will have accurate shadows too. I hope that helps, but write again with any other Q's. Nick