Fixing position misalignment issues
It’s unlikely that your animation is going to perfectly match your video, and it’s just as unlikely that the retargeting process is going to be smooth sailing either. There’s always a slight mismatch between the source and target rigs. One of the most common problems is the arm positions, which mostly boils down to the T-pose and the A-pose.
As MetaHumans are set in an A-pose, and our DeepMotion rig was set to a T-Pose, this is where there’s a problem. In the event that you chose T-Pose in DeepMotion, there’s a handy little fix that saves you from having to go through the download and retargeting process again.
As you can see from Figure 6.21, showing the IK Retargeter interface, we can see the problem: the source DeepMotion character is in a T-Pose and the target MetaHuman character is in an A-Pose. In this scenario, because of the misalignment, the arms will not animate properly and will most likely intersect...
