My raycaster render engine demo

My raycaster render engine demo based on Lode Vandevenne's raycaster tutorial. http://lodev.org/cgtutor/ Games like Wolfenstein 3d and Rise of the Triad use similar raycaster techniques to this. Features added: - skydome - sprites support alpha blending (the tree object has some shadow under its pot, see 0:30) - a single box can have different textures on all 6 sides (or each side can be missing) - 2nd and 3rd levels of walls, camera can move up and down - thin walls (windows) - fog effect - further walls are darker in this case - to speed up rendering, a post effect shader is used to apply fog on the image and render the skydome Experimenting with this technique took place in summer, 2011.