Although quality may be lacking in the .gif, this shader is wonderfully interesting.
It displays not only a very interesting pixel overlay, but also warping the fragments
of those said pixels, as they got closer to my cursor.
On this piece, I used a variation of trigonometry functions, elapse time and uv coordinates.
I've always been fascinated by the thought of creating more with less. Not only is that
theory excellently impressive, but efficient too. The less information stored the better.
This fragment shader was developed in my engine, GenGein.