Talk:SmileBASIC (Petit Computer 3)/@comment-15296152-20150410073732/@comment-15296152-20150410193135

My understanding of why you can't draw multiple z-level ploygons is because graphic commands are writing in a render-to-texture way, where the texture is the graphic page assigned and has no actual z-offset attribute, and at the end, 2 polygons that expand the entire screen are used to with this texture to place it using the assigned z-value to determine if they are in front or behind other things.