This is an interesting point. The point is made elsewhere in the thread that if you miss the deadline, but send what you have drawn so far anyway, with modern t

This is an interesting point. The point is made elsewhere in the thread that if you miss the deadline, but send what you have drawn so far anyway, with modern typical rendering software/hardware you'd get an incomplete drawing with holes and missing layers etc. But that is not what tearing is. Tearing is, you've missed the deadline, so you finish the rendering to completion, then swap the buffer in the middle of a vertical scan. What you're saying is, you can do that, or wait until the next vertical scan before swapping the buffer. And further more, that can either result in simply a skipped frame, or the game switches down to a 30fps mode, perhaps based on some running statistical about frame render durations. I'm reminded about a discussion Carmack (was it him? or am I having a brain fart) about mitigating the tearing and framerate problem by doing per scanline rendering instead of per frame rendering. hmmm! I will have a long think