VRChat PhysBones not working on Quest (hair and skirt don't move) - limits and fix

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What you see on screen:

What it means

Quest (Android) avatars have hard PhysBone limits. If the Android version goes over any of them (Very Poor), VRChat removes all PhysBones, Contacts and VRChat Constraints from the avatar - not just the extra ones - even if someone presses Show Avatar. The mobile limits are 8 PhysBone components, 64 affected transforms, 16 colliders, 64 collision checks and 16 contacts.

Common causes

• The PC avatar's PhysBones were kept as-is in the Android version
• Outfits and accessories each added their own PhysBones
• Long chains (hair strands, skirts) push affected transforms past 64

How to fix it

1. Switch to Android, build, and check the PhysBone numbers in the SDK's performance stats
2. Decide which chains to keep (usually hair first, then ears/tail, then skirt) and remove the rest from the Android copy only
3. Combine small chains under one PhysBone where you can, and use Ignore Transforms to cut affected transforms
4. Remove colliders and contacts you don't need
5. Build again and confirm every PhysBone line is within the limits above
6. Leave the PC avatar unchanged - work on a duplicated Android copy

Before you change anything, make a full copy of your project folder so you can go back.

Related errors

• VRChat avatar is Very Poor / Poor
• VRChat Quest "Avatar uses unsupported shader" (pink on Quest / Android)
• Uploaded VRChat avatar not showing, or others see a different avatar (robot / fallback)
• Dynamic Bone left on a VRChat avatar

See other errors