Unity 2018 Shaders and Effects Cookbook - Third Edition

How it works...

Using the built-in helper function named Luminance(), we are able to quickly get a desaturation or grayscale effect on our shaders. This is all possible because of the UnityCG.cginc file is brought automatically to our shader as we are using a Surface Shader.

If you search through the UnityCG.cginc file when opened in a script editor, you will find the implementation of this function at line 473. The following snippet is taken from the file:

// Converts color to luminance (grayscale)inline half Luminance(half3 rgb){    return dot(rgb, unity_ColorSpaceLuminance.rgb);}

As this function is included in the file and Unity automatically compiles with this file, we can use the function in our code as well, thereby reducing the amount ...