Hi, I have a scene with fluid pouring down in a glass. As the fluid gets into the glass bubbles are spawning. The fluid is set up as phase0 and the bubbles as phase1. Though I need the phase0 particles to remain due to interaction with the phase1 particles, I only want to render the phase1 (bubbles) particles. Is this possible?

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Probably not the best way to do it, but you could add a custom boolean ICEAttribute to each particle that tells you which phase it’s in and create a render tree based upon a color switch shader and a boolean attribute shader to read from the ICEAttribute. One value gives the color switch the color you want to render, the other value gives the color switch a transparent, invisible particle…
If this trick works with Lagoa is another question, which I sadly ATM cannot test…

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Hirazi Blue 26 October 2011 07:05 AM

Probably not the best way to do it, but you could add a custom boolean ICEAttribute to each particle that tells you which phase it’s in and create a render tree based upon a color switch shader and a boolean attribute shader to read from the ICEAttribute. One value gives the color switch the color you want to render, the other value gives the color switch a transparent, invisible particle…
If this trick works with Lagoa is another question, which I sadly ATM cannot test…

I was going to say pretty much the same thing: pull the State_ID attribute into your render tree and use that ton [somehow] control what renders.

Hi,
thanks for the replies, I give it a try and let you know if it turned out good

Hi, I dont seem to get it right. I plug 2 Set data nodes and in exlporer I choose Lagoa Phase id and plug them into each Lagoa phase nodes in the icetree.
Then in the rendertree I plug a Boolean attribute shader and selec State id ( cant find any Lagoa Phase id attribute) and connect that to a colorswitch and to a color to scalar and to diffuse on a Phong. (booleanshader-->Colorswitch--->colortoscalar--->phong

But I still see all the particles even though i choose transpancey in color1 in the colorswitch.
Could you please explain a little bit more detaild......really appreciate it/O