Volumetric rendering

Blender's renderer and external renderer export

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Volumetric rendering

Post by xcif3r »

Hi all,

Can Blender own render do volumetric rendering? What about yafray ?

If not, is there some trick to fake it ?

What I want to do is to setup a light like a laser and be able to see the light

as it travels on space.

Thanks in advance, and keep up the excelent work.

Happy Blending


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Location: Somewhere in South America

Post by Fred_Pyo »

For volumetric lighting you must use SPOT lights. Under the light buttons you can find a "HALO" button under the "Shadow and Spot" tab. Render your scene and you'll see your spotlight's "volumetric lighting".

If you want to have the lighting react to objects (that is, have it not project through an object) you must set "Buf. Shadow" under the "Shadow and Spot" tab, and set the "Halo Step" to a number from 1 to 12. 12 produces less quality object detection but VERY fast render times. 1 produces PERFECT volumetric lighting... but takes LONG to render.

To simulate a laser beam the spotlight won't be of MUCH use because I think laser beams are straight forward and spotlights emit conical lights... So I did a little search at the elysiun.com forums and found this:
http://www.elysiun.com/forum/viewtopic. ... laser+beam

Check it out.
And another tip, if you post at the elysiun.com forums, you might be able to get much more replies, so I encourage you to visit http://www.elysiun.com's forums. There you will find various forums for each of your specific blending needs.

Good luck!

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