[Sidefx-houdini-list] I3d Question

Simon Barrick simon at primalpictures.com
Fri Feb 17 06:24:53 EST 2006


Yep I have one somewhere, I'll try and mail it too you.

-----Original Message-----
From: Jaideep Khadilkar [mailto:iamjaideep80 at yahoo.com] 
Sent: 17 February 2006 11:23
To: sidefx-houdini-list at sidefx.com
Subject: RE: [Sidefx-houdini-list] I3d Question


Hi Simon........
 I added one color channel in my 3d texture. But the problem is that,
standard fog shaders (VEX 3D Texture Fog) can not process color channel.
It treats that as a float and gives me a black & white output.  Do I
need to write my own Fog shader? Or is there any simple trick, because I
think having a different colored smoke, or at least a color variation in
the fog,is a day to day need for any artist. 
 
 Thanking in Advance...
 
 -----------iamjaideep80
  Jaideep Khadilkar 
  (TD, Sciclone Motion Graphics)
 
 

Simon Barrick <simon at primalpictures.com> wrote: For adding a color
channel just use a color parameter set to export, you should then be
able to pick up this channel inyour fog shader.

-----Original Message-----
From: Jaideep Khadilkar [mailto:iamjaideep80 at yahoo.com] 
Sent: 17 February 2006 07:50
To: sidefx-houdini-list at sidefx.com
Subject: [Sidefx-houdini-list] I3d Question


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. 
 Also, forpoints(P) Loop is to loop thru all points or metaballs. 
 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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