Hi @pantakan.totae,
I’m afraid that RL isn’t really suitable for body pose estimation. A more closely related work for RL might be AMP (Adversarial Motion Priors - [2104.02180] AMP: Adversarial Motion Priors for Stylized Physics-Based Character Control).
We have AMP as an example in IsaacGymEnvs:
Take care,
-Gav