you can try particle systems with a blur filter applied (there is a free
one at boboland that you can assign to a material or object ID cannel).
Also, there is a plugin called Fractal Flow that apparently can do this
> I was wondering how to make heat distortions. Is there a way to do it
> without plugins that looks at least half decent or if not where can i get
> the specific plugin?
> Thanks in advance.