Your default skeleton looks to be lacking some spine bones. Why is this?
As we use AI to understand what the key points of the body are. The spine is the least visible of bone structures and so we make assumptions about it based upon where the other joints are positioned. As such, having too many bones in the spine could add additional noise to the animation.
How does retargeting work in your system?
We have a rig mapping functionality in the platform. This allows us to retarget onto the rig of your choice, automatically using our proprietary scripts.
Do you deal with IK or FK controllers?
Ordinarily clients will have FK and IK controllers on the arms and legs, this way the mocap data we retarget is properly transferred to the FK controllers. Clients decide how to transfer data from FK to IK themselves and that's usually done by baking of animation data from FK to IK. That said, if you have a rig you want to send us to test out, we'd be happy to take a look at it!
How do I retarget to a larger rig? I.e. a giant
The animation will be passed over in the retarget onto the bones of your rig. However what will not be passed over is the dynamic forces onto the new rig. By that we mean, a giant moves in a slower more laboured way to a person.