No, it uses normal mapping.peabnuts123 wrote:sonictag hl2 and css both use bump mapping.
They even have tutorials out on editing normal mapping on planet half life 2. Normal mapping is more advanced and uses more levels of normals. Bump mapping can just be black and white, but halo appears to use normal mapping textures for their bump mapping.
http://www.fileplanet.com/files/120000/129654.shtml
theres even a video showing off the normal mapping and everything.