Instance node use point Attribs (Alpha)

[Fyre]

Hey guys,

 

I'm using the instance node and am trying to get point attributes such as Cd and Alpha to affect instances on a per instance basis.

i.e. opacity over time.

Does anyone have any ideas?

 

Cheers

 

[Kino]

Check out this thread http://forums.odforce.net/topic/9044-stamping-with-instance/. As mentioned here with the instance node you have 2 choices, either have different all the variations you need on the disk or use " Delayed Loading".
You can vary your copies via the s@instancepath attribute in the instance node as mentioned here http://forums.odforce.net/topic/23294-houdini-16-wishlist/page-12#entry143811but if none of these methods work in your scenario I think you're left with copy/stamping and using the point attribs for each stamp, Iike the example I attached ( 1- I put the box behind the spheres so you can see the transparency . 2- most of the new shaders work with the float variable "opac_int" as their opacity attribute)

 

 

copyStampVaryAlpha.hipnc

[fathom]

material overrides might be what you're looking for.  you can use a material sop to assign different shader values to different instances (or you can create your own override attribute using the material sop as a guideline).

[Kino]

material overrides might be what you're looking for.  you can use a material sop to assign different shader values to different instances (or you can create your own override attribute using the material sop as a guideline).

Absolutely correct, if it's only material parameters (or any other object level parameter for that matter) such as Cd and Alpha that you want to vary then s@material_override is your best and fastest bet, sorry I overlooked this.

Edited February 26, 2016 by Kino