I uploaded another example to the skydrive. You can't actually do anything in it except walk this one corridor. I'm sorry about this, it didn't work out the way I wanted: I had complications rendering the normalmaps. It was supposed to look much, much better and be much bigger. Also, the black borders weren't intended, it was supposed to be all textured, but I'm getting tired and I've worked on this for many hours now...

Focus on this new example was supposed to be the normalmapping+specularity and the level geometry. To create best results I believe we should make all visual elements as well as the interactive elements (boxes etc) as models and only the collision should be done with block geometry. That was sort of my focus...