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I have put several coins above a table and I want physics simulation to make them fall on a table. So far, I have almost succeeded, but some coins dance for a very long time on the table (nearly 21s!).

The table is set as passive, shape for collision = box, collision margin set to 0.000001m. Coins are set as actives, shape for collision = cylinder, collision margin set to 0.000001m as well.

Friction is set to 1 and bounce to 0 for both the table and the coins.

With these parameters, the simulation doesn't look very realistic. Does anyone know how I could improve it?

My file can be downloaded here :

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  • $\begingroup$ hello maybe share your file (only the coin with the problem and the surface) $\endgroup$
    – moonboots
    Commented Nov 1, 2023 at 16:45
  • $\begingroup$ File added as asked. $\endgroup$
    – Zelig63
    Commented Nov 2, 2023 at 7:17

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Reset to default
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Delete the bake, choose Shape > Convex Hull instead of Cylinder which seems to work better (not sure why).

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    $\begingroup$ Maybe the ngon isn't poked, and so it's running calcs on a shape that is being triangulated differently at times $\endgroup$
    – Allen Simpson
    Commented Nov 2, 2023 at 15:03
  • $\begingroup$ Oh OK this may explain, thanks $\endgroup$
    – moonboots
    Commented Nov 2, 2023 at 20:33
  • $\begingroup$ Triangulating both faces of the coins without any improvement, but changing the shapes from cylinder to convex hull makes the difference. The result is now much more realistic. Nevertheless,, it's a very surprising solution! $\endgroup$
    – Zelig63
    Commented Nov 3, 2023 at 16:27
  • $\begingroup$ I think Allen was talking about the virtual cylinder if you choose this option under Shape? $\endgroup$
    – moonboots
    Commented Nov 3, 2023 at 16:30

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