View Full Version : mapping volumetric lights

05 May 2003, 03:13 AM

Is it possible to map a texture file onto the volumetric emission of a spotlight? I have been trying to get the volumic streaks of a spot light to pick up the color of a map but have been unsuccessful so far? Any help appreciated...


05 May 2003, 05:24 PM
As far as I know this is not possible to do that in XSI, although it was in SI3D. Go figure. If someone found a trick, please share.

There is a solution, although it is far from being convenient. You can set a volume_effect shader where you want your light affect the scene. Put a projector on the light, and the volume_effect will do the rest. Good luck messing with the volume_effect.


05 May 2003, 06:33 PM
You can also stick a texture mapped grid in front of the light too.

Like this:

05 May 2003, 10:21 PM
that was what I was looking for... thanx a lot...

05 May 2003, 06:34 AM
Originally posted by EdHarriss
You can also stick a texture mapped grid in front of the light too.

Argh what was I thinking?

Although it is still not the ideal solution, as it can involve increase of rendering time. Though it still beat the volume_effect approach...

Thanks Ed

05 May 2003, 01:58 PM
Anytime. :beer:

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