Well, while you are right for the way games and GPUs currently work, there is more than one 3d rendering algorithm- Zbuffer is not the end all be all. The quest

Well, while you are right for the way games and GPUs currently work, there is more than one 3d rendering algorithm- Zbuffer is not the end all be all. The question is what can be rendered efficiently with the hardware we have. At some point we could collectively decide that having a rock solid framerate is more important than more detail, decide to use a scanline progressive renderer, and there you go. It is possible, but would we do it? But on the other hand I was confused- I forgot that zbuffer was the algorithm still in use in most game rendering engines. and you cleared that up. thanks.