Below is a "cheat sheet" or summary paper on how to perform this conversion. 1. The Standard Workflow (Unity + UniVRM)
An open-source, platform-independent 3D avatar file format built on top of glTF 2.0. Developed by the VRM Consortium, it adds avatar-specific constraints and data, including humanoid bone mapping, blend shapes (facial expressions), eye gaze tracking, first-person perspective settings, secondary spring physics (for hair and clothes), and license information.
If your model comes from an AI generation tool (like Meshy, Luma AI, or Rodin), it may have problematic topology with excessive polygon counts, missing UV maps, or incompatible materials. These issues need to be addressed before VRM conversion—otherwise, the exported model may be extremely laggy or crash when loaded. convert glb to vrm
Using Blender allows for fine-tuning the model's mesh and textures before export. Required Add-on : You must install the VRM Add-on for Blender , which adds native import and export capabilities VRM Add-on for Blender
: The exported VRM file is much larger than the original GLB file (sometimes double the size). Below is a "cheat sheet" or summary paper
Converting GLB to VRM is a straightforward process using tools like Blender or dedicated conversion software. By following this guide, you can successfully convert your 3D models to VRM format, ready for use in virtual reality and augmented reality applications.
Open Blender, go to Edit > Preferences > Add-ons , click Install , select the ZIP file, and enable the checkbox next to the VRM format importer/exporter. Step 2: Import and Prepare your GLB Model In Blender, clear the default cube, camera, and light. Developed by the VRM Consortium, it adds avatar-specific
Navigate to the section. Here, map your mesh's shape keys to standard VRM expressions: A , I , U , E , O (mouth visemes), Blink (eyes closed), Joy , Angry , Sorrow , and Fun . Step 5: Export to VRM Go to File > Export > VRM (.vrm) .
After conversion, test your VRM file in multiple applications: