# Is it possible to animate the Gravity parameter of a physbone?

**URL:** <https://ask.vrchat.com/t/is-it-possible-to-animate-the-gravity-parameter-of-a-physbone/48890>\
**Category:** Avatars\
**Tags:** avatar\
**Created:** [August 28, 2026, 10:01am UTC](https://ask.vrchat.com/t/is-it-possible-to-animate-the-gravity-parameter-of-a-physbone/48890 "2026-08-28T10:01:11Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Xan](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/xan/32/10119_2.png) [@Xan](https://ask.vrchat.com/u/Xan)\
**Post date:** [August 28, 2026, 10:01am UTC](https://ask.vrchat.com/t/is-it-possible-to-animate-the-gravity-parameter-of-a-physbone/48890/1 "2026-08-28T10:01:11Z")

</div>

I’m working on an avatar, and one of the toggles I have adds gravity to its tail. I can get it working, but it requires a duplicate physbone that I swap out on the fly.

Some of the stuff I’ve tried which failed:

- Animating the gravity parameter alone.
- Disabling the physbone component, changing the gravity parameter, then re-enabling the component (3 frame animation).
- Doing both of these with the “Is Animated” checkbox (though I am aware this doesn’t actually affect the Forces fields, I mostly just did it anyway for the sake of brevity)
- Doing both of these with the “Reset When Disabled” checkbox (ditto on the above)

Has anyone gotten this to work without the duplicate physbone component? If so, how? Thank you.

---

<div class="post-metadata">

**Author:** ![fluffycritter](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/fluffycritter/32/13936_2.png) [@fluffycritter](https://ask.vrchat.com/u/fluffycritter)\
**Post date:** [September 1, 2026, 5:05am UTC](https://ask.vrchat.com/t/is-it-possible-to-animate-the-gravity-parameter-of-a-physbone/48890/2 "2026-09-01T05:05:18Z")

</div>

Unfortunately, the last I was aware, physbone parameters can’t actually be changed while the bone is active, which is very annoying. Vote on [Allow animating Physbone properties | Voters | VRChat](https://feedback.vrchat.com/feature-requests/p/allow-animating-physbone-properties) if you’d like to see this changed.