NEXBONE Scanner

Find out what's wrong with your avatar before VRChat does.

Short description

A read-only diagnostic tool for VRChat avatars. Point it at a prefab, and it reports what's actually broken — rig problems, missing PhysBones, broken materials, expression parameters over budget, uncompressed textures — with the measurement, why it matters, and how to fix it.

It never modifies your avatar. There is no upload button and no network code.

What it finds (25 rules)

- Rig — missing descriptor, duplicate descriptors, non-humanoid rig, missing humanoid

  bones, viewpoint at the origin or far from the head

- Skinning — empty skinned meshes, no bones, no root bone, meshes not read/write enabled

-PhysBones — hair and cloth chains with no physics, no colliders, simulation cost

-Expressions — synced parameters over the 256-bit budget, custom expressions with no

  assets assigned, empty animator layers

-Assets — oversized and uncompressed textures, VRAM estimate, missing mipmaps,

  long audio clips, missing shaders, empty material slots

-Cost — triangle budget against VRChat's performance ranks, blendshape count

What it will not do

- It does not fix anything. It tells you what to fix.

- It does not upload, and it never contacts the VRChat API.

- It does not judge your art. It reports measurements, not taste.

- It will not catch everything. It covers the mechanically checkable set by design.

Requirements

Unity 2022.3 · VRChat SDK Avatars 3.x

Install

1. Unzip.

2. In Unity: **Window → Package Manager → + → Add package from disk…**

3. Select `package.json` from the unzipped folder.

4. Open Tools → NEXBONE → Scanner.

Honest note

Two rules were removed after testing against a real 925,000-triangle avatar because they

were wrong, not merely noisy. The changelog says which and why. A tool that has never been

tested on real avatars is a tool that will waste your afternoon.