A cordial greeting. It seems appropriate to share an observation, I do it with respect. I have analyzed some poses for the sirens of sims 4, which are published on the internet. These poses were generated from a base: the mermaid dummy (made by EA games). The creators of the poses modify the shape of the tail, it looks great, but this produces an important limit. Pose, shape or posture will be compatible only with the siren tails of EA games, or compatible with the tails (slightly modified