I'm new to Blender. I apologize in advance if the question is not clear, I will try to explain the problem as best as I can.
I have a mesh that represents a knocked-down box (think rigid, hard material) ans I'm trying to animate it into a folded box container. To do that I rigged my mesh as follow:
From a high-level overview, everything works fine. However, I notice that the stretch at the junction of the bone when folding 90 degree is too large.
This behavior causes undesirable hole in corner of the folded box because the stretching of the joint was too large.
How do I reduce this stretching.
File for reference: