Quick Lighting in Shadertoy

In this tutorial I showcase a couple of different ways to quickly add lighting to a 3D model when all you have is the normal vector. I also get opinionated about the ambient component of the Phong model. Links: Quick Lighting Tech - https://www.shadertoy.com/view/ttGfz1 Explanation of the "erot" function - https://suricrasia.online/demoscene/f... "Computer Color is Broken" i.e. why we take the square root at the end -    • Computer Color is Broken