Awesome

Manifold

Portal renderer for Sega Genesis/Megadrive.

Uses a "2.5D", doom or build engine-style rendering pipeline, but with convex sectors and portals.

Graphics features

• Arbitrary angled walls, ala doom and build-engine.
• Perspective-correct texture mapping
• Sector-based lighting levels with per-pixel distance lighting.
• Overlapping "non-euclidean" geometry
• Transparent surfaces.