I'm getting some unbalanced forces when using grains, its the same problem as described in the grains masterclass around 32:50. As Jeff says the solution is to disable constraint averaging and then insure all the internal forces add up to 1. I've done this but I still have an imbalance.. I wanted to check which forces are meant to add up to 1, in the video it implies that Internal Collisions + Clumping + Explicit Constraints = 1. However in the help document it mentions that Friction with Particles should be included as well.
So should I set Friction with Particles, Internal Collisions, Clumping and Explicit Constraints to 0.25?
Grains - Disable Constraint Averaging
1100 0 1- Michael Battcock
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