This is really a quick-made product - the basis of it was made on-site at Imagine Cup 2004 finals, and the rest just before the Assembly.
- Precomputed radiosity lightmaps.
- Precomputed ambient occlusion maps for the spiders. Of course, this is fake (as the spiders are moving :)).
- The spiders move and animate (esp. the last scene) "procedurally" - the animation isn't a canned one. So, collision detection and all other stuff is in there.
- Simple things: planar reflections, soft (blurred) projected shadows, etc.
Thumbnails, click for a larger shot.