Heat Haze

[Chris]

one method a guy posted on the discreet webforum sounded pretty good.

Make a whole lot of splines coming out of the engine or whatever & apply noise modifiers to them (all with different seeds) make sure they are not checked as renderable in the object properties, but turn on 'object motion blur' then render - the splines dont render but the object motion blur distorts whats underneath...

I've never tried it but it sounds easy... :)

[Crazy Max]

Thanks... I will give it a try. :D

[beej]

do it post (err...post post?)! render out a particle system pass & use it as displacement layer in your fav. comp software. I promise good things...

[TapioKa]

Hey Chris,

I tried that heat haze effect with motion blur that you suggested. Sounds like a great idea, but it doesn't seem to work. Would there be something I'm missing in terms of process? When the spline in not renderable nothing renders. Is there a special material to use?

Any feedback is appreciated.

cyril

[Joebount]

Make the spline renderable but assign a texture with 0 opacity and 0 specular : it should make the trick now

[TapioKa]

Hey Joe,

I've tried that, but it does not seem to work. It works if the texture is visible, but when you make specular and opacity = 0 the spline does not render nor does the MB.
I must be missing something as other people have talked about it, but no luck so far.

I guess compositing is better because you always have control to tweak such things. Could an object or material ID be used as a separate layer in an RLA?

Any ideas?

Thanks,

cyril

[Gilgamesh]

Maybe try "image motion blur" rather than "object motion blur?"
Maybe that will work, but I don't know. I haven't tried.

[TapioKa]

You win the prize! Yes, it was image blur that has to be set
in order to work. That was my mistake.

Thanks for your help!

cyril

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