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I am trying to make a field of grass "blow in the wind." I have used random rotations to vary my grass clumps, but can't figure out a way to apply and set the rotation values so I can add another layer of animated rotations using an animated noise. Currently when I apply the animated rotation vectors with Rotate Instances, the instances carry the random rotation and bends every which way instead of all-together in a direction. Is there a way to "zero out" the instances after they've been rotated randomly?

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is this what you are searching for?

you can uncheck "local space" on rotate instances and plug in the position to give each a global angle:

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  • $\begingroup$ Interesting, using the position input as the pivot point AND turning off Local Space. These field nodes are taking some time to get used to. $\endgroup$
    – Nathan Overstrom
    Apr 9, 2022 at 16:20

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