|work| — Convert+glb+to+vrm+better

Converting a GLB file to VRM is a common task for VTubers and social VR users, as the VRM format is essentially a specialized GLB wrapper with extra metadata for humanoid rigs, bone physics, and facial expressions.

. You must bind bones to standard VRM humanoid slots (hips, spine, neck, etc.) and ensure the model is in a convert+glb+to+vrm+better

Is the model in T-pose or A-pose? (VRM works best from T-pose)
Are the bone names standard? (e.g., mixamorig:Hips or Armature|Hips)
Does it have blend shapes (morph targets) for the face? Without them, your avatar will have a frozen expression.

Ablation studies: material baking vs shader mapping, atlas vs separate textures, with/without blendshape consolidation.

User study: perceptual preference.

🔁 The core problem: GLB doesn’t enforce humanoid structure. VRM requires it. Converting badly → broken expressions, twisted limbs, lost blendshapes. Converting a GLB file to VRM is a

Method 1: Using Online Conversion Tools

Bake all modifiers (especially armature & subdivision)
Check bone naming — VRM requires Japanese/English humanoid names (Hips, Spine, Neck, etc.). Rename if needed.
Merge meshes by material (VRM hates multi-object blendshapes)
Reassign vertex groups so each bone controls ≤4 weights

For a fast, no-software solution that handles the heavy lifting of metadata, use gltf2vrm (GitHub/Web). It is specifically built for this purpose and allows you to map bones and expressions directly in your browser. Select your file: Upload your .glb model. Is the model in T-pose or A-pose