PhysBone Tuner — Set how hair, skirt, tail and ears sway, by part in one click [VRChat / Unity] (Free trial available)

PhysBone Tuner is a Unity editor extension that lists your avatar's PhysBones, sorts them by part, and lets you set how each part sways in one click. Hair often has 30 or more separate PhysBones; instead of editing them one by one, choose Soft, Normal or Firm for Hair, Skirt, Tail, Ears or Chest and press Apply. One Ctrl+Z undoes it. The window can switch between English and Japanese.

No avatar models are included (tool only).

Free vs Full

• Free trial: list PhysBones (including turned-off ones), sort them by part from names and bone positions, find problems, and see counts.
• Full: apply a feel to each part (Pull, Spring, Stiffness, Gravity, Gravity Falloff and Immobile), and set Radius on checked hard-to-grab PhysBones (the before and after values of those rows are shown first).

Importing the Full version over the Free trial replaces it.

What it finds

• Hard to grab: grabbing is on but Radius is 0.
• May be set to stay still: Pull, Spring and Gravity are all 0, or Immobile is 1 (All Motion). The tool does not change these, because some are stopped on purpose.
• Possibly doubled: an upper PhysBone has "Ignore Other Phys Bones" off and its bones overlap a lower one. The tool does not check whether they move at the same time.
• Counts: PhysBone components and affected transforms, compared with VRChat's PC and mobile performance rank numbers.

Tested before release

Made by Kotokoto Lab, an independent creator. In VRChat: a free avatar with Soft applied to its hair, tail and ears was loaded and shown as a local test avatar with the SDK's Build & Test. Tested on 3 free avatars (10, 57 and 56 PhysBones): only the chosen part changes, one Ctrl+Z puts the values back, unchecked rows are not changed, and prefab files stay unchanged. In the Free trial, the apply and Radius paths do not change values.

Notes

Integration Type, limits, colliders, grab settings, curves and Immobile Type are not changed. Stiffness is not used by Simplified PhysBones; curves are applied on top of the new values. PhysBones whose values are animated start unchecked, and face PhysBones (cheeks etc.) are not changed. Radius is used for both grabbing and collision, so setting it can change how a part touches the body. Values overridden in Avatar Optimizer's Merge PhysBone are used after upload. Prefab Mode and Project prefabs are view-only. The list and counts show the setup before the upload build, and counts cover only what is under the object you set. The tool pauses in Play mode.

Requirements

Unity 2022.3 (tested on 2022.3.22f1) and the VRChat SDK (Avatars).

How to install

1. Download the .unitypackage (Free trial or Full) and drag it into the Project window, then click Import.
2. Open Tools > PhysBone Tuner and drag your avatar from the scene into the field. The window has an "English" checkbox at the top.

Terms

OK for personal and commercial use. Do not redistribute or resell the tool. Use at your own risk.

Questions or bug reports: please send a message through the shop.