Here’s a video of me retargeting my idle anim to a metahuman:
EDIT: video re-done with the new project’s version, so no remove and re-add virtual bones anymore
The hands position aren’t supposed to be preserved on the new skeleton, several bone sizes are different, specially hands. Since I’ve included an IK system in the anim BP, you can fix hand position on the gun quickly in the anim graph, just using one TransformBone node. If you want more specific instructions, please come to the Discord server where I already have pics for that. I just need to ask you to please send me your Order ID privately so I can send you the invite (to see your Order IDs just login to unrealengine.com, hover over your username on the top-right corner, then click Personal → Transactions).
Thank you!