Heat Distortion

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ThermO

Hi All,

I am considering adding a "Heat Distortion" effect to my FPS and was wondering what the best approach may be.

I have a couple of Armoured tanks that leave their detroyed remains on the terrain for some time. I would like the remnants to show a refractive effect in the atmospehe just above the wreck (3 to 5 feet?)

My immediate thought is a Quad that always faces the cam. Beyond this, I need some suggestions. I am looking for a subtle distortion ....less is more etc.