The filter
This tutorial will teach you how to create and use post-processing effects which simulate how colour blind players might experience your Unity game. One of my most anticipated games is The Witness; since it uses so many vibrant colours, it will be used as an example in this tutorial. This is how a player affected by red-green colour blindness (protanopia) might see it:
The image effect provided in this tutorial will help you understand which parts of your game are harder to see for color blind users.