FX Tools: Smoke Heavy. attach Cd Ramp?

[atrytone]

In the FX Tools shelf that is available from SideFX there is a asset called Smoke Heavy. I would like to control the color of the smoke based on a ramp that has a lookup attached to Age or Life of the particles. It is simple enough to replace the Cd attribute in the shader with a Ramp parameter, but if I do that the color of the smoke doesn't respect the ramp.

Any assistance would be fantastic.

Thanks.

[eetu]

Just adding the ramp doesn't work, as the metaballs do not have any age parameter by default (in the hda).

You need to make sure that the life/age attribute is retained until the render flag.

Then import the age parameter in the shader and use that as ramp input.

eetu.

PS: I was surprised when I added an "age" point attribute and set it to $LIFE.x, what it actually gets

set to is life[0]/life[1]. This is of course the correct age, but feels funny that Houdini would do something

'behind the user's back'

edit: This would probably be a lot faster if you set the age ramp to metaball "Cd" in SOPs, this way in

a shader it is really quite slow..

heavysmoke_Ramp.hip

Edited October 6, 2008 by eetu