Complex Model Workflow Using Mixamo

Mesh Preparation: Combine all individual meshes (hair, shirt, trousers, etc.) into a single mesh.

Export Options:

• Export as .obj if you don't want materials. This is proper because reducing it causes AI assistants to work less. 
• Export as .fbx if you want materials containing textures (when exporting, you must zip the .fbx file and texture.png/jpg together)

Upload to Mixamo: Upload your model to Mixamo for rigging.

Download Options: Download the rigged file with mesh connected to bones:

• .fbx binary format (for large bones)
• .dae format (for small bones)

Import to Blender: Import the downloaded file into Blender.

Clear Parent: Remove the parent relationship between objects and the armature.

Adjust and Arrange:

• Adjust and arrange the model
• Set the origin to the center of both the object and armature
• Armature must enter Pose mode to clear transformation(Alt g), rotation(Alt r) and scale(Alt s)
• Apply transform (shift a)

Parent/Connect: Parent or connect the bones to the geometry with empty group.

Animation Rigging: Set up the rigging for animation actions.

Prepare for Export: Push the animation actions you want to export to Godot.