Rendering lit fog as a seperate pass.....

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Hi,
Is there a way,i can render out the light fog as a separate pass using image plane.
I m using litfog shader to generate the fog for a light.
Would appericate any help.
Thanks !!
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What i do for this, is to create a Mantra ROP with Objects in Forced Mate, and select only the light i want to illuminate the fog.
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Hi,
That totally worked !!
Thankyou so much !!
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One more question …:
usually is the light fog ..slower in mantra than any other application i have seen ….is that normal …?
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Yes, Lit Volume rendering is slow with Mantra.
Use “Micropolygon Rendering”, change value of “Volume Step Size” (greater will be faster) and use Deep Shadow Map for your light.

Cheers
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Have a search on here and odforce. I vaguely remember Jeff making a volumetric light type effect using a volume primitive, which renders super-fast. It's a bit of a hack, but its good, fast and easy to separate into a pass.
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Have a search on here and odforce. I vaguely remember Jeff making a volumetric light type effect using a volume primitive, which renders super-fast. It's a bit of a hack, but its good, fast and easy to separate into a pass.

I use a volume vex primitive to make skytracer spots. It's very fast and got a viewport preview. But the only prob i have is there is no volumetric shadows.


So, ragupasta, do you know if Jeff's volumetric light has some volume shadows ?

Thanks
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