Another test where I integrate inter-particles friction , air damping and "wall" friction. I'm happy to see it's working fine and look like a cube of sand falling on the ground. Probably with more friction the pill stay more higher or keep more is cube shape. Stats: 1000 molecules Simulation time: 1.5sec per frame Substep : 2 substep per frame Number of frame: 400 (24fps) Render Time: ~1-2sec per frame blenderartists.org
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