Hi kids!    Admiral Deltakosh recently adjusted some code to get our CannonJS heightMap impostors working somewhat better. (still avoid non-square terrains) BUT (there's always a but)... check this out [PG test #45].  Wait for all the movement to stop.  Are all the boxes sitting on their edges?  Impostor-meshShape rotational-sync issue?  Me thinks so. Also, I think I see muddy ground (mesh slightly sinking into terrain).  We will know more... once the rotation issue is solved