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This is my version of the very nice animation done by @MJV in this thread. Some notes: - I deliberately exaggerated the cloth bending effects in this one to differentiate it from an RBD sim. I realise that this makes a departure from the objective of the original, but I quite like how this turned out. - The cloth is fairly high density, I have not subdivided it after the sim. It took 5 mins to sim 480 frames, which is pretty good imho. A pure RBD sim of this would be significantly faster. - I animated the velocity damping from very high at the start, to allow the big ball to settle into place quickly (and also why the start of the animation looks unrealistic), to a very low amount once the smaller balls start getting emitted, so that they wouldn't be bogged down by the damping. - There is a variable stiffness on the cloth - it's very stiff at the borders, to simulate the tautness of it being pegged to the ring, and falls off to not very stiff in the middle, to simulate the lack of support there. - Vellum usually does not allow object emissions at intervals (the built-in options are Start Frame, Each Frame, and Each Substep). This being Houdini, a quick expression allowed me to override that to emit the balls once every second instead. - I am including the scene file here, but fair warning - I have not annotated anything, so good luck. It also includes the Solaris setup. Marbles.hiplc