How to add a random speed to $F?

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Hello All,

I am having an object that is rotating in $F speed along Y axis. Now, I would like to have it not only rotate $F but also random speed (speed up a little or slow down and almost stop…etc.). Based on my very tiny expression knowledge, I think this is achievable in expression or really need to do it in other ways?

I tried to multiply or add an rand() value to $F but nothing happens….hahaha, feeling stupid to experimenting like this. oops

Thanks for your help,

David
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I would suggest using Motion Effects

http://www.sidefx.com/docs/houdini12.0/network/motioneffects [sidefx.com]
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Thanks, Erik! A lot of effects to choose from and combine together with.

Sincerely,

David
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