PARTICLES (POPs)

This section focuses on particles

As of writing, my Houdini version is 20.5.614

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LAYERING 2 POP FORCES TO CREATE DYNAMIC MOVEMENTS

Putting a SECOND POP FORCE with a bigger swirl size on top of an existing POP FORCE can create more dynamic movements for the particle simulation.

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USING POP PROPERTY ON POP SOURCES

The POP PROPERTY node allows you to further manipulate the physical attributes of the pop particles such as the friction, drag or mass, in one central node.

• One powerful function of the pop property, is its ability to adjust these values AFTER THE SIMULATION HAS BEEN COOKED, which is useful for making changes without needing to re-sim.

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CREATE A LINE FROM POP SIMS USING TIMESHIFT AND ADD NODE After CACHING a POP simulation, you can TIMESHIFT it and merge it back with the original to create a perfectly trailing copy of the simulation. Then you can use an ADD SOP to link those two simulations together through the ID attribute, which the pop solver automatically creates. This is an example of the workflow below:

This will create a line between the original pop sim and timeshifted popsim where the length of the line is dependant on the timeshift length.

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