Looks great! I couldn't help noticing that it tests every pixel on the "screen" to see whether it's inside a face. Back in the software renderer days we'd run

Looks great! I couldn't help noticing that it tests every pixel on the "screen" to see whether it's inside a face. Back in the software renderer days we'd run the inner loop just for the pixels that fell inside a triangle. But then you'd need to explicitly handle polygon clipping and it would greatly complicate the code. I guess 320*240 tests is nothing these days. Anyway, great job!