For details about how relief mapping works refer to:
demo -> http://fabio.policarpo.nom.br/files/reliefmap3.zip
paper -> http://www.shadertech.com/contest/#reliefmapping
http://fabio.policarpo.nomThis modifcation will not damage your Doom3 installation. It will just extract some textures from the game data pack and modify them to include depth information.