Hello Lilnyc, I would model the top flap separately and use a bend deformer (Deform_Nonlinear_Bend) to deal with the curve - you would need a few subdivisions in the mesh to make it bend smoothly. To abimate the flap simply set the pivot to the base of the flap and key the movement. Hope this helps Thanks, toddster, I appreciate your response and demonstrations. People like you make these forums nice. Unfortunately my issue was making an envelope that could hold paper. I ended up using a template. That project (that I bought) was completely made in After Effects using one texture layer that was made into multiple 3D layers.