For the Semi Permanent Title Sequence 2017, I created a fluid sim that filled this glass container and picked up tiny grains. The grains follow the flow direction of the fluid, and they start to react and glow.

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A challenge on this shot was getting the fluid to actually fill up the fluid container quickly enough without losing the initial details when the spouts first start ejecting water.

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The particles were then driven by the velocity fields of the fluid, with some minor tweaking for artistic direction.