Currently porting to C++ . . . finally ! ! !
This is the High-res version of an earlier one (link below):
SimulationDetails are in the video...simTime and particle numbers can be seen. Arnold Render to follow...This one is simulated with 7 substeps at 250fps. Likely 5 substeps would have been ok also. Low friction (I forgot -.-), so it is more like a mixture of powder and moist sand rather than some wet sand only. But still, I like it. Comment and feedback please :)