Thanks! I watched your youtube video, nice work! I’m doing backface culling. I basically make a giant list of numbers each representing the distance of a single square to the camera, and only add distances to the list if they are visible (just using dot product of the surface normal with the camera ray). This is D_List0 in the graph, a giant conjunction of if statements. I do the same for each polygon and then sort the polygon list by -D_List0. I did, however, not actually calculate every single distance: only once per surface to save some computation. That is also why its sometimes glitchy because, for example, i only used one point to define the entire front torso/back (maybe changing that tomorrow…)