Need more details on the pose skeleton input to the generator

[LightingMc]

I was just wondering if you could provide details on this.

The source_skeleton, target_skeleton are both of size (20, 256, 176). What do these 20 planes represent? i saw the first 3 are related to pose and the last three are heat maps? Can you give more details please?

The 3 pose planes look like this for me:

and the heat maps also look weird:

What do all these different 20 planes represent?