How to improve the accuracy for a rigid bodies

Question

How can I keep the objects from intersecting or passing through one another in rigid body simulations?

I have

• checked the normals
• applied all transforms for scale, position and rotation
• set Origin > origin to geometry
• increasing the Steps per second and Solver Iterations in the Rigid Body World settings (I tried with the maxima 1000 and 100)
• set collision shape to Mesh and tried 0.4 or 0 as margins and source to final

https://drive.google.com/open?id=1R3VSiNKWK5TWL3tfe1ZYt2A8fLL8QoW1

Answer 1

^{Work smart, not ...}

Okay, so you realized Blender bullet solver implementation is not as strong out of the box. Therefore we have to help it out a bit.

• Reconstruct your geometry with simpler shapes. In your specific file, I could just create the crate out of 5 cubes (the walls and floor) which are then parented to the crate geometry.
  
• Use simple rigid body shape wherever possible. I made the walls into Box colliders and the sphere into Sphere colliders.

Now, you realized, that the Steps per Second and Solver Iterations don't ensure a more stable simulation, if we just increase them. Here comes a workaround: We'll make our subframes into actual frames by slowing down the simulation and the speeding it up afterwards.

1. Scale the keyframes apart by 6. The box now moves 6 times as slow.
2. Adjust the speed of the rigid body simulation. I entered 1.0/6.
   
3. Adjust the playback speed. The fps will be 24*6 and the render steps can be 6. (Obviously the scene's end will have to be adjusted as well.)
   
4. Increase the Solver steps and Iterations as needed. I used [500, 500], as shown in the above image.

The resulting simulation is stable, although my computer can't playback a 144 fps.