Its a registry editor that allows the user to get their video card to render even lower than the mininum settings for tpeople who want to play on the big/forest maps or simplly more performance.
[R-COM]Robbi already posted a dl link and mentioned it but I figure I throw in a guide to help those of us who are tech-impaired.
here's some pics of me using Rivatuner on Beirut
wow, empty base, can't miss anything here
now lets get going
The trees look like giant clovers
The everything's so smooth!
Before on lowest settings
After on Rivatuner
Even with the lowest settings it is still hard to pick out targets, its alot easier when every surface has only one texture to compare to (I find it easier on the eyes too)
Rivatuner starter's guide:
by Grenadetrap WARNING: Don't mess with these applications, they can and most likely will screw up your hardware if you poke around wihtout knowing what your doing or if your not following the guide.
Step 1 - Download RivaTuner
RivaTuner v2.24c download from Guru3D.com
Step 2 - Install RivaTuner
Extract the setup file somewhere, double click on the setup file and follow the wizard.
Step 3 - Set up RivaTuner
Wait for it to compile your registry
Once this has completed you will get to the main RivaTuner screen.
Next, click the power user tab.
Then expand the "RivaTuner \ NVIDIA \ Global" menu. Enter a value in "LODBiasRange" of 15.
Go back to the main tab. Then click on the little arrow Under "Driver Settings" next to where it says "ForceWare detected." Click on the directX Symbol to open a new window (Pink in screenshot below).
In the new window, adjust the slider to where you want it. Put it on 0 to turn off any changes (Application will decide the LOD). 15 will be worst textures.
