I added the lights and the rats in the sewers generator. Lots of things are still missing :
- the twisted corridors/room generator
- the cellular automata based cave generator for even more strange caves in the lowest levels
- improved mobs AI (for now, they don't move until you reach a certain range, then they attack you until they die...)
I also added an article on the algorithm used to determin the potential visible set in TCOD :
http://jice.nospam.googlepages.com/visibilitydetermination