Installation:
Just put the two files from the zip in your "C:\...\Darkfall\Data" Folder.
You can enable/disable the effect by pressing "shift+F12" within the game.
The mod just raise the Shadermodel to 3.0 and adjust some effects
like bloom and color correction.
So it might not be a violation of the
Aventurine Terms. But there's no guarantee from my side.
