I recently downloaded detail texture pack to improve image quality in HL and Sven. There is one problem however. Command r_detailtextures does not show up in console like every other command do. If I type "r_detailtextures 1" in console and start up game, detail textures are not showing up.

YES, I am using steam version of HL.

My graphics card is 8500GT, not the most powerful one but it should support detail textures. Detail textures worked well on my previous card (7600GT).

Does anyone know how I can fix this? I am using Vista if that matters.