Interlaced Rendering (Patreon)

I've thought about it for a long time, and I'm going to implement interlacing in Retroquad's renderer.

I was always scared of the possible visual artifacts caused by interlacing, but after researching other 3D games that already uses it, the tradeoff should be acceptable. After doing some rough tests in Retroquad, I estimate that the increase in framerate should be around 75%.