Talk:SmileBASIC (Petit Computer 3)/@comment-25017421-20141003041921/@comment-15296152-20141003080306

Doubtful. PTC3 has GPRIO, so the graphic layer will continue to operate on the same depth. Think of the graphics layer as one large quad polygon that gets sent to the main buffer each frame, and that you're plotting pixels onto a 2D texture that the polygon uses, rather than writing pixel by pixel to the main buffer directly.