Fix PhysBones not working on Quest - Quest PhysBone Keeper [VRChat / Unity] (Free version)

Your hair, skirt and tail move on PC - but on Quest everything is frozen?

On Quest, an avatar over the PhysBone limits is ranked Very Poor and all of its PhysBones are removed. (Why PhysBones stop working on Quest)
To fix it you have to choose which ones to keep and which to cut - and count transforms and collision checks by hand.

Quest PhysBone Keeper does the counting for you. Press Analyze and it makes a plan:

• Which PhysBones to keep, starting with the parts that show the most: hair, skirt, tail, ears, then the rest
• Why each one is kept, shortened or removed
• The numbers now / after the plan / limit for components, affected transforms, colliders and collision checks

How the plan fits the limits

• Keeps the most noticeable parts first (recognized from their names)
• Shortens long chains so the ends stop moving, instead of removing the whole thing
• Removes endpoints (saves one transform per chain end)
• Turns colliders off where needed to fit the collision limits
• Deletes PhysBone colliders that no kept PhysBone uses (they count even when unused)
• Don't agree? Switch any PhysBone to Keep or Remove and the plan updates
• Option: aim for Medium (shown by default on Quest) instead of just keeping PhysBones

Free vs Paid

Free ($0)

• Plan: which PhysBones to keep, with reasons
• Now / after / limit numbers
• Change Keep / Remove yourself
• Select the PhysBone in the scene
• Copy the results to paste when asking for help

Paid ($5) - everything in Free, plus:

• 1-click: make a Quest copy with the plan

With the free version you follow the list by hand. The paid version makes a copy of the avatar, applies the plan to the copy, and hides the original - the original's settings are not changed. Ctrl+Z (Cmd+Z on Mac) undoes everything.

Good for

• You're making a Quest version and the hair and skirt don't move
• You don't want to count transforms and collision checks by hand
• You want to keep the parts people notice and cut the rest

Not for

• Other Quest conversion work (shader swap, polygon reduction) - this tool only handles PhysBones
• Avatars already within the limits - it will just tell you nothing needs to change

Language

English and Japanese interface. It shows English automatically unless your Unity or OS language is Japanese, and you can switch with the "English / 日本語" toggle at the top of the window.

Install

1. Drag the .unitypackage into your project and Import
2. Open Tools > Quest PhysBone Keeper
3. Drag your avatar into the Avatar field (or select it) and press Analyze

Requirements

• Unity 2022.3 (the version VRChat uses) with the VRChat SDK (Avatars) - it needs the SDK to read PhysBones
• (Tested in Unity 2022.3.22f1 with VRChat SDK 3.10.5)

Notes

• Limits follow VRChat's published Quest limits. Counts are estimates; the SDK's numbers are final.
• Parts are recognized from object names. If a part isn't recognized, it's kept only if there's room - use Keep / Remove to change it.
• Shortened chains stop moving at the ends, and parts with colliders turned off may clip into the body.
• When you upload the PC version, show the original avatar again (the Quest copy is a separate object).
• This is not an official VRChat tool.
• Digital product - no refunds after purchase. Bugs will be fixed in updates.
• Questions and bug reports: please send us a message on Jinxxy.

Also from this shop

• Performance Rank Doctor - see why your avatar is Very Poor / Poor on Quest & PC: https://jinxxy.com/kurodan/performance-rank-doctor
• Avatar Setup Doctor - fix pink materials, Missing Scripts & upload errors: https://jinxxy.com/kurodan/avatar-setup-doctor

About AI use

This tool was built with AI assistance. Every feature was tested by the creator in Unity 2022.3.22f1 with the VRChat SDK before release.