[Sidefx-houdini-list] I3d Question
pbowmar at gmail.com
Fri Feb 17 05:55:15 EST 2006
This is not very easy, you have to modify the Metacloud shader,
and also the 3D Texture Fog shader (that's the hard one). However,
you're in luck, I have already done this :) I'll try to post it to the
Exchange in the next day or so.
On 17/02/06, Pablo Giménez <pablogipi at gmail.com> wrote:
> On 2/17/06, Jaideep Khadilkar <iamjaideep80 at yahoo.com> wrote:
> > Hello Everybody,
> > Does anybody know, how to have different colors for different metaballs in
> > image rendered using I3d??????
> > What I think is, we have to create a color channel in 3d Texture created
> > using i3dgen.
> > Then have to use that channel in Fog shader. For that we have to have our
> > custom i3d shader and fog shader.
> > Am I going right???
> > I am trying to do that, but something is going wrong. I am taking color
> > attribute from my geometry.When adding color channel in i3d shader,
> > whether we have to use mattrib() function inside forpoints() Loop or
> > outside.
> You have to use mattrib() inside a forpoints() to have access to the
> metaballs coordinate space. In other words the forpoints() function is
> similar to the luminance() function for lights, it give you access to the
> Also, forpoints(P) Loop is to loop thru all points or metaballs.
> Thu all metaballs inside a known radius.
> I think it loops thru all metaballs one by one. correct me if I am wrong.
> > Thanking in advance.
> > -------iamjaideep80
> > Jaideep Khadilkar
> > (TD, Sciclone Motion Graphics)
> > ---------------------------------
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> Un saludo
> Best Regards
> Pablo Giménez
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