Rigid Body Joint Constraints can't hold model together in game engine I made a simple model (wanted to mess with physics and python scripting).


That's bunch of boxes held together with RigidiBody joint (6dof joints with all limits checked)

Problem - model falls apart in play mode:



It DOES try to adhere to constraints, but after wobbling for a several seconds it eventually collapses, which is really disappointing.

Here's the file.

Is there a way to fix that (so it adheres to constraints PROPERLY) or should I try another software?

The idea was to try to make this thing walk using physical forces (exercise/fun, not a serious project)



The scene was tested on windows platform, 64bit blender 2.74 on 64bit windows 7.
Due to lack of solution I gave up on trying this experiment in blender.

I also investigated V-Rep as possible alternative only to find out that it has same issue.

In the end it looks like I'll have to do that experiment (when I have time) in unity3d, because PhysX apparently does not have this stability problem.