I have tested an image from the data you have provided in the project website.
How can I visualize the 15 x 3 data in SCAPE or Blender?
The ground truth joint- 3D coordinates are defined in Blender's local coordinate system/camera coordinate system or that of SCAPE? This is not clear , also from the paper, how the coordinates can be mapped to real-world.
I have tested an image from the data you have provided in the project website.
Thank you