basketball court thingy 

The projection math is all point-based and supports lines and quads. Most of the quads (like the walls and roof) have stamped tiles (most of which are small squares) that are bi-linearly interpolated (not all placed manually).

There are ~2.5k points in this scene, ~2.3k of which are tiles. There are lines at the edges of these quads to cover up some of the jaggedness.

The point data is stored in lists, and there is one world sprite that sets up these lists and then a separate render sprite. There are several layers that get rendered in a fixed order. There is no realtime z sorting going on. Sin and cos operations use a lookup table.