From Blender To VRM Tutorial - Full Body & Facial Rigging + Setup - Blender to VTuber Avatar

Introduction

This tutorial provides a comprehensive guide on how to create a VTuber avatar by transitioning from Blender to VRM format. It covers full body and facial rigging, ensuring your avatar is ready for use in virtual reality environments. By following these steps, you'll learn the necessary techniques to set up your character effectively.

Step 1: Prepare Your Blender Environment

• Install Blender: Ensure you have the latest version of Blender. Download it from Blender's Official Website.
• Set Up Your Project: Open Blender and create a new project. Import or create your 3D model that will serve as the VTuber avatar.

Step 2: Create and Assign Shape Keys

• Add Shape Keys:
  • Select your mesh.
  • Go to the Object Data properties panel (green triangle icon).
  • Under Shape Keys, click on the '+' button to add a new shape key.
• Modify Shape Keys:
  • Enter Edit Mode and modify the mesh to create expressions or movements (e.g., smile, frown).
  • Return to Object Mode and adjust the value of each shape key to test the expressions.

Step 3: Set Up Rigging for Body and Face

• Add Armature:
  • In Object Mode, press Shift + A, select Armature, then choose Single Bone.
  • Position the bone within your model to represent the spine or central axis.
• Edit Bone Structure:
  • Go into Edit Mode and add bones for limbs and facial features as needed.
  • Ensure bones are properly aligned with the mesh for accurate movement.

Step 4: Weight Painting

• Parent the Mesh to Armature:
  • Select the mesh, then the armature, and press Ctrl + P. Choose "With Automatic Weights."
• Adjust Weight Painting:
  • Switch to Weight Paint mode. Use the brush to refine the weights assigned to each bone to ensure smooth movement.

Step 5: Export to VRM Format

• Download UniVRM: Access the Unity VRM Package and import it into Unity.
• Export from Blender:
  • Go to File, select Export, and choose VRM format (may require an add-on).
  • Save your file and ensure all settings are correct for VRM compatibility.

Step 6: Import and Configure in Unity

• Open Unity: Start a new project and import the UniVRM package.
• Import Your VRM File: Drag and drop your exported VRM file into the Unity project.
• Configure Avatar Settings:
  • Click on the imported avatar and adjust settings as necessary (e.g., avatar description, gestures).
  • Test the avatar in the scene to ensure functionality.

Conclusion

You've successfully created a VTuber avatar by rigging and exporting it from Blender to VRM format. Key points include:

• The importance of shape keys for facial expressions.
• Proper rigging techniques for natural movement.
• The process of exporting and configuring your avatar in Unity.

Next steps may involve further customization of your avatar or exploring animation techniques for enhanced performance in virtual environments. Happy animating!