I was playing around with some realtime shader ideas and decided to implement a hatching shader. In my opinion the end result is somewhat nice. Below are some screen caps. You can judge for yourself.

I think these shaders would neatly enhancements to anyone who is working with cel shading. You know how hand drawn comics sometimes use hatching for shading? Same idea.

As far as the details of how it's implemented, I'll say this: It's all done in one pass, and the style, waviness, and thickness of lines are controlled by variables passed to the shader.

I'd appreciate it if you would leave me your opinion. Sorry for forcing you to register to leave comments, but I'm fed up with automated comment spam. Oh, and there is no email validation when registering register, so you can fill out this form with garbage. TIA

Diagonal lines

Wavy horizontal lines

Hexagonal grid of circles

Unhatched scene to show surface diffusion