Air Distortion

This is a Air Distortion (also called Heat Distortion) shader. You can use it to simulate airflow effects caused by rapidly moving objects or heat sources. The shader loads a bump image, then uses its red & green color value to distort the grabbed texture (only do grabbing operation once per frame for performance). Also supports UV animation and Mask image.

To present distortion effect, you just create a game object (e.g. billboard, trail, etc), then assign a material with Air Distortion shader to the object. No extra script needed.

Tested on Unity3.5, forward & deferred lighting, DX Shader Mode 3/2/1 (Graphics Emulation), OpenGL ES 2.0/1.1 (Graphics Emulation).