Unnecessary Collisions created at collider edges (results in bodies "jumping")

Unity Engine
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2

The issue you described is expected issue of having speculative contacts for fast bodies. More about the issue you can find in this talk from the referenced time:

So if ground has to be mesh there are 2 approaches that I see:

  • Try to implement customer contact modified like ModifyNormalsJob in UnityPhysicsSamples\Assets\Demos\5. Modify\Scripts\ModifyNarrowphaseContactsBehaviour.cs
  • Switch to Havok physics