HalfTone Shader

I've been working on my cutscene component for my current space project and I decided to render these like old Science Fiction pulp comics. Here is the before and after shots of the halftone shader.

 To get this effect I've converted RGB values into CMYK. The CMYK values are then rendred the same way a printing press would do it. Each base color is drawn as sheets of dots rotated from each other.