Overview : https://youtu.be/NoS-4Bvapi4
This is a basic naked character for Mutable. It is rigged to the Epic Skeleton and has additional bones.
To reduce draw calls, the entire body except for the eyes and eyebrows is made with a single material. The texture size is 8192 x 8192, but you can reduce it to your desired size. Additional bones include left and right chest bones, left and right hip bones, and a pelvis guide bone. The overview map contains a sample animation blueprint for chest movement, which you can refer to.
https://www.fab.com/listings/0195b5c4-fdfb-4982-8c2c-618f949a6481