- Import the file in to Blender (you may need to check the file type in our explorer first).
- Use object and edit modes to delete any unwanted geometry, like the head of the model if you are replacing the head.
- Use the same technique of selecting points and using CTRL + L To select linked points.
- With more complex models, turn on X-ray View to make selections easier.
- Adjust your geometry positioning to make the Pose as close to an A or T-Pose as possible.
- Re-export your model as an FBX ready to be uploaded in to Mixamo.