But that's just a polygon model rendered on what looks like a few 2D layers in isometric view. Fully 3D environment is a whole different league. I remember doom

But that's just a polygon model rendered on what looks like a few 2D layers in isometric view. Fully 3D environment is a whole different league. I remember doom for the GBA, which isn't even polygons but a very simple ray caster, and it ran notably slower.