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.
Ensure your character is in a strict . This is critical for accurate motion capture tracking.
Ensure your model is facing the positive Y-axis (looking forward in the front view). Step 3: Map the Humanoid Bones Select your character's armature. convert glb to vrm
An automated online service that allows users to upload standard 3D files and optimize them specifically for virtual platforms.
With your model imported:
VRM utilizes specific shaders (like MToon). If your textures disappear, check your material settings in Blender or Unity and ensure the texture maps are explicitly embedded within the file rather than linked externally.
Rename your bone hierarchy to match VRM’s expected names: Hips, Spine, Chest, Neck, Head, LeftUpperArm, RightUpperArm, LeftLowerArm, RightLowerArm, LeftHand, RightHand, LeftUpperLeg, RightUpperLeg, LeftLowerLeg, RightLowerLeg, LeftFoot, RightFoot. In Blender, you can rename bones in Edit Mode. If your model comes from an AI generation
If you're working with an older VRM 0.x file that you imported, UniVRM includes migration support to convert it to VRM 1.0 format.
Ensure your model is facing the positive Y-axis (front view by pressing Numpad 1) and stands in a or A-Pose . A standard T-pose yields the best results for VRM tracking software. Step 3: Map the Humanoid Bones Select your character's armature (skeleton). This is critical for accurate motion capture tracking
Visually slide and map your facial expressions. VRM First Person: Set the offset for the tracking camera. VRM Spring Bone: Add dynamic bounce to chains of bones.
Assign your mesh's existing shape keys to standard VRM expressions like Neutral , A , I , U , E , O (mouth shapes for talking), Blink , and emotions ( Joy , Angry , Sorrow ). Step 5: Add Spring Bone Physics (Optional)