I am using Rigid Body Physics in Blender 2.83 to have some cubes fall into a bowl. It should be quite simple, but as you can see the result is grossly over-dramatic.

What am I doing wrong, or not doing?

Thanks, Paul

Frame grab

enter image description here

  • $\begingroup$ cant really get whats wrong , can i get a pic of a larger frame covering the place where the cubes are coming from , if you have sandwiched the closely , they will collide with each other and then scatter apart $\endgroup$ – SHikha Mittal Sep 14 '20 at 15:29
  • $\begingroup$ Hi, I have added a picture of the cubes before they drop. There is air between each cube. This might be a bug with Physics Properties > Collisions > Shape > Mesh in Blender 2.83. The Physics works for Shape > Box, etc. just not for Mesh. When I set it up exactly the same in Blender 2.79 it all works as one would expect. I will try 2.9 to see if the bug has been sorted. Unless you know any work-arounds???? $\endgroup$ – Paul St George Sep 14 '20 at 16:57
  • $\begingroup$ Can you post a picture of your cube physics settings? Also, how are you generating the extra cubes? $\endgroup$ – Michael Sep 14 '20 at 23:05
  • $\begingroup$ @PaulStGeorge look at the sensitivyty and check collision margins , and set it to 0.01 $\endgroup$ – SHikha Mittal Sep 15 '20 at 1:38
  • $\begingroup$ Yes. I had Scene Properties > Unit System set to Metric. So, even though I was using a small number for the Margin the distance was too big. Changing the Unit System to None did the job. I could then, as suggested, put small numbers in Margin settings and in Settings > Mass. Now it works!! Thanks!!! $\endgroup$ – Paul St George Sep 15 '20 at 7:44

This is happening because the margin of the the cubes are too big , you need to shorten it by going to sensitivity > check collision margin and enter numbers like 0.01


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