look for Perfected Doom3. Gameplay change, "hi res" bloom, hdr, ssao, all that. As long as your RIG can handle it. Also look for Sikkmodd, and/or Wulfen. THese are texture mods only. Pretty nice when combined. Just check out moddb.com
duct tape ruins the unique flashlight mechanic that adds suspense and strategy to your gameplay. i guess if you're looking for your doom 3 experience to be like every other shooter it's a good mod though.