Maya : Renderman / RIS particle color

The process of getting renderman to render particles with assigned color was not obvious to me. So when I found the solution I thought I'd pass it on. Here we can use the PxrPrimvar node to pass color data to the standard Pxr shaders (or any RIS shader). We can also create new variables and pass that information on as well by prefacing our var name with "rmanC" - for color. In the video I cover both. Enjoy!

[@Aegis_Mind]

Absolute LIFESAVER! Very easy to follow! Thank you very much!!

[@carlosgon]

This was like finding the Holy Grail!! Thank you very much

[@MiRaje8086]

oooo looks nice

[@CTDRUFPB]

First of all many thanks, this tutorial was very useful for me. Any idea to how render the particles with inherit opacity in Renderman 21?

[@altruizine]

Ze Marcelo CTDR-UFPB I haven't used 21 yet, but I imagine it's similar, you can add attributes to be read and pass them in to arrivistes you need to control. I'll keep my eye out for it though... thanks!!

[@CTDRUFPB]

From your tutorial I did tried many things to render the differents levels of particles opacities, but the problem is I haven't no idea what variable to use to capture the opacity and I don't know in what PxrDisney input node I should connect my PxtPrimevar node.

[@CTDRUFPB]

Hi, I think that I found the solution to how pass OpacityPP to the particles in Renderman 21. So, we have to create a PxrPrimvar, to use "Os" as variable name. Then connect the Result F output of PxrPrimvar Node in Presence input in PxrDisney Node. I have to do more tests but I think that's the right way.