Why is the elbow bended?

[KikuchiRyosuke]

Hi, thank you for your appreciate work.
I successfully run code with pre-trained model to output 3D png file.
However, I have some problems about elbow.

These are the results I got from your code.

Left: input data(StackedHourglass)
Center: 3D prediction (front)
Right: 3D prediction (above)

Figure1_RaiseAbove

Figure2_RaiseForward

Problems are here:
in Figure1, the right elbow is bended more than input. Therefore I cannot predict hands-up-pose correctly.
in Figure2, the right arm is raised forward, but it's predicted to be raised sideward. In addition, the elbow is bended.

Do you have any ideas about these problem?
I look forward to hearing from you.