[tylerdiaz]

Looks like he's ray casting it, no 3D code implemented, just the illusion itself.

[antirez]

Well... actually the code contains a minimal 3D engine, it is not an illusion, you have the observer variable and could use it to navigate inside the map created in the initialization function. What is more 3D than that? :-)

[Jare]

There is no explicit geometry, polygons, or GPU acceleration, but raycasting in 3D is certainly 3D.