Maya Geometry Affect The Visibility Of Particles

[oliverwolfson]

How can I make Maya geometry affect the visibility of particles?

I want to cause particles to become visible as a piece of geometry passes through the field of hidden particles.

Thanks for any tips.

Oliver

[joojaa]

Im still working on example for you be patient. I dont really get paid and this is actually quite much work to do well, and i only have like 30 minutes a day to spare for you. Still polishing my aproach, i know how to brute force this but i wouldnt like to do so.

It would be so easy if I could use the api for this but theres no way i can justify the cost of doing so as just being kind.

[oliverwolfson]

Thanks Joojaa,

I appreciate it!

Oliver

[duncanbrinsmead]

The simple way for this sort of effect is to do a couple of passes and composite, although compositing volume effects is sometimes problematic.

Duncan

[joojaa]

Yes, i was thinking of something very similliar, except doing the sam thing as i would do in comp with particle dynamics. By setting up a collision object then turn particles visible on collide. Invisible on uncollide.

Offcourse the ORIGINAL question tahts not visible here is a bit more comvoluted. And requires me to run 2 simulations one forward and on back. Because he would probably like to have the colors also picked up by the surface. And i was thinking a simple lerp might suffice. However proximity is a bit hard toa chieve very sanely.

Tough to be honest i didnt think of comping it thet would meak sense for a better inetpolation.