How to transform hand pose from 'flat_hand_mean=False' to 'flat_hand_mean=True'?

[nehc0]

I have the left/right hand pose parameters each of shape (15, 3) for example, which are correct when 'flat_hand_mean=False'. How can I transform the pose parameters to the case 'flat_hand_mean=True'?

[nehc0]

Solved. When 'flat_hand_mean==True', the initial pose for hands is flat open pose and the parameters are all 0; when 'flat_hand_mean==False', the initial pose for hands is rest pose and the parameters are not all 0. In the 'SMPLX_NEUTRAL.npz' file (download from the official smplx website), there are keys 'hands_meanl' (left hand) and 'hands_meanr' (right hand), these are the pose parameters of the rest pose of hands. Just add these to the hand pose parameters of 'flat_hand_mean==False', we obtain the hand pose parameters of 'flat_hand_mean==True' for the same hand pose.