Particle Color -> Emission Color?

[goldleaf]

I've been having a similar problem that Denis was having (http://forums.odforce.net/index.php?/topic/14862-particle-color-to-instance-geometry/); I've tried the point()/pointinstance() method eetu and Denis found working, and that file seems to work in the example hip, but I can't get it to work with Emission Shaders.

Is there something inherent in the shader, or the way instances work, that doesn't allow instances to transmit the particle's color as the emission color for that instance?

Thanks!

shader_emission.hipnc

[symek]

That's the difference between fast and full instancing, no instancepoint() evaluation is done. Still you can apply materialSOP and create per point attribute to vary shaders' input parameters. It is actually a little waste to make use of instancepoint() on shop parms in any case btw.

Full instancing is also much faster recently in render time, but there is not much to be done to speed up soho part

shader_emission_skk.hipnc

[goldleaf]

That's the difference between fast and full instancing, no instancepoint() evaluation is done. Still you can apply materialSOP and create per point attribute to vary shaders' input parameters. It is actually a little waste to make use of instancepoint() on shop parms in any case btw.

Full instancing is also much faster recently in render time, but there is not much to be done to speed up soho part

Ah! Thank you! I thought I'd tried to use the Material SOP, but I must have put it in the wrong place (if I recall correctly, I think I tried to put it on the instance itself :/)

And thanks for the tips on the instancepoint() expression! Very useful to know!