Shader Pack: Lighting Adjustments for the Enhanced Editions
The original games included options to set brightness and contrast. Sadly these options were removed from the Enhanced Editions (except for PST:EE).
This mod provides a way to bring back the means to adjust brightness, contrast and gamma. Version 3.0 greatly expands the possibility to alter lighting and colorization by adding options to adjust color temperature as well as hue, saturation and lightness.
You can grab the latest release from the download links below. Previews of all individual settings can be found in the readme linked below.
Links:
Read the original article at The Gibberlings Three