It will highlight exactly which bones or meshes will break the conversion. Fix them in Blender first, then export directly to VRM. Conclusion
When you convert a raw GLB, you often lose this data. "Fixing" the conversion usually means re-mapping the bones and re-assigning materials so the avatar actually moves like a person. The Best Way to Convert: Unity + UniVRM
In Unity, look for the VRM BlendShape Proxy . You will need to manually click through "Blink," "A," "I," "U," "E," and "O" and move the sliders on your mesh to define those shapes. This "fixes" the avatar so it can talk and blink. 4. Normal Map "Inversion" Sometimes the lighting looks "inside out." convert glb to vrm fixed
Click to ensure the "bones" are mapped correctly. If the character’s neck is mapped to its toe, this is where you fix it! Step 3: The Conversion (The "Fixed" Export) Drag your model into the Scene hierarchy. In the top menu, go to VRM0 (or VRM1) > Export to VRM . Fill out the required metadata (Title, Author, Version).
Download the latest .unitypackage from the UniVRM GitHub . Drag and drop it into your Unity Project window. Step 2: Import and Standardize Drag your GLB file into the Unity Assets folder. It will highlight exactly which bones or meshes
Select the materials in your Unity Assets. Change the Shader from "Standard" to VRM/MToon . This shader is optimized for VRM and handles lighting and transparency correctly. 2. The "Spaghetti Limbs" (Rigging Issues)
Use the version recommended by the platform you're targeting (usually a Unity 2022 or 2019 LTS version). "Fixing" the conversion usually means re-mapping the bones
If your arms twist weirdly during movement, your GLB likely had "Bone rotations" that weren't zeroed out.
Select the model and go to the tab. Under Animation Type , ensure it is set to Humanoid .