The Natural Light variant of Toussaint's lighting mod for The Witcher 3: Wild Hunt is a new mod that aims to reduce the yellow tint of the sun and make it a more neutral, white shade without tweaking the vanilla values too far. It's a natural-looking modification to the standard lighting.

The outcome of this mod is basically from increasing the blue value and reduced the red value of the sun color and then reduced saturation by half.

This mod is not a complete overhaul of the game, but it's a small change that makes a big difference.