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I have made a sphere and assigned a hair particle system. I'd like to scale the hair particles in one area when higher than that of another area and would like to animate that too.

Q: How to animate the particle hair size?

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  • $\begingroup$ U can animate particle size by hitting i key in the scale input box $\endgroup$ – JacksonPro Dec 6 '20 at 5:43
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I'm not exactly sure if I understand your question correctly, but you can easily animate particle scale:

In your particle settings, under "Render" right-click on "Scale" and choose insert keyframe. Alternatively, you can click on the small dot right to the box.

Then, go forward in your timeline, insert a new value for "Scale" and again, insert a keyframe.

enter image description here

This may result in something like this:

enter image description here

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Just right-click the scale value, then click insert keyframe. Move to another frame, then edit the scale value. Right-click the value, then add another keyframe. This will animate its size.

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