# Add VRM extension if not gltf.extensionsUsed: gltf.extensionsUsed = [] gltf.extensionsUsed.append("VRM")
In Unity, select the model and look at the VRMLookAtHead component. Ensure the target eye bones are mapped to the actual physical eye meshes, and that the horizontal/vertical limit values aren't set to zero. 2. Hair and Clothes are Stiff (No Physics)
If you want a professionally VRM, you must use Unity. convert glb to vrm fixed
Drag your new .vrm file into VRM Posing Viewer . Does the model follow the mouse? Are the eyes blinking? Yes. That is the "fixed" result.
def _export_vrm(self, vrm_data: Dict, output_path: str): """Export to VRM file format""" # Convert to GLB first, then add VRM extension import struct import json # Add VRM extension if not gltf
After researching countless conversion failures and user reports, here are the most important takeaways for fixing your GLB to VRM conversion:
vrm['glTF']['meshes'].append(mesh_def)
Check your humanoid bone mapping configuration. Ensure left-hand finger bones are not accidentally mapped to right-hand slots. Additionally, ensure the thumb bones follow the proper rotational axis relative to the palm.
When converting, you are moving from a standard 3D mesh (GLB) to a semantic avatar model (VRM). Common issues include: Hair and Clothes are Stiff (No Physics) If
: Converting GLB to VRM isn't just about changing the file format; it's about translating the model's data into a structure that VRM can understand. This includes reworking the model's bones, adding skinning information, and sometimes adjusting the model's geometry to fit VRM's requirements.
print(f"✅ Successfully converted glb_path to output_path") return True