The IK rigs are the same as the one in the first post of this thread. To elaborate on the IK / goals set up, I opted for using 4 limb IKs. Using a full body IK caused the clavicles to move too much and produced some poor looking animations for the arms. I isolated the clavicle from the arm chain and make a limb IK that goes from the upperarm to the hand. Originally I had the leg chain go from thigh to toes, with a IK goal on the toes. It produced some foot placement issues, though I don’t remember enough about what exactly it did (I think the heel was lifting off the ground at odd times). I ended up doing something similar with the arms, isolating the toes from the leg chain and making a leg IK from thigh to foot. I found this set up got the best behavior from the IKs and it produced animations that are nearly identical to the source animations. I did get some issues with the feet IK until I set the hinge axis in the IK Rig → Limb IK → Two Bones → Hinge Rotation Axis. I did this for the arms as well, though they rotated around the Z axis based on my skeleton’s set up.
Limb IK 3/4 (feet) IK Rig settings:
As far as the IK Retargeter goes, I just use default settings for all the IKs. I only adjust the base pose of my skeleton and fix the toes chain mappings (the auto chain mapper doesn’t know toes == ball, so it instead attributes it to the thigh). I have tried the animation retargeting with the blend to source of the feet set to 1. Since my heel isn’t as high as the mannequin, my foot raises a bit. I used the z offset to correct it and get it back on the floor. This produced results nearly identical to what the foot IK gives me with blend to source set to 0, so I just turned it back off / deemed it unnecessary.
Arm IK Retargeter settings:
Leg IK Retargeter settings:
The project settings are very simple, I basically just started the project in UE5. All it has in it is Advanced Locomotion System V4 from the UE Marketplace and my custom mesh from Blender. I’m not sure why, but you can’t add ALS directly to a project, so I had to make a 5.0 project for ALS and then migrated the folder over to my project. ALS is working just fine, so I think the migration happened without issue.