I’m making a scene in Maya where I have a burst of cards. I made a particle system and added some geometry (textured cards) as instances. To get the rotation I found an expression to make random rotation. My goal is to stop the particles in space and do a time freeze and move the camera. I used the “conserve” option to stop the cards in space but the expression rotation is still happening. I was wondering how to add keyframes to the expression so I can stop the rotation of the particles at a particular frame so every the particles completely freeze in space allowing me to animate the camera. Sorry for making this so long please help me out.
[NEED HELP] Keyframing Expressions in Maya (2014)
seedthomas
#2
Just add a custom Attribute to your particleSystem, eg particle.rotationSpeed and integrate it in your expression, something like:
particleShape.rotPP = << (frame * particle.rotationSpeed), ((frame+20) * particle.rotationSpeed), ((frame+40) * particle.rotationSpeed) >>;
Keyframing your “rotationSpeed-attribute” should now slowdown your particleRotation.
terr20114
#3
Thank you for the reply 
I did some tweaking to the animation and found that slowing down the rotation speed made a great effect and actually added to the time freeze. I’ll try adding the expressions you sent and see how it goes. thanks again @seedthomas 
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