Please ask for feedback on exercises. That is part of what this hub is for. The way he explains the projection method I can understand but it is backwards for me. I tend to think about drawing the cube at the biggest shape then subtracting. The purpose of either method is to find the location and shape of the outermost visible edges. This is true for the corners and sides. I cheated and made some CAD models to make things clearer, I hope. Hope this helps. | Artwod Feedback