SideFX and Emily Fung have recently shared a thorough guide for Houdini users.
The tutorial will guide you through the process of performing compression on a stack of solid objects, showing how you can harness the power of the updated FEM solver in Houdini 18. The new global-nonlinear (GNL) solver works with the new built-in Neo-Hookean material model.
The artist created an example with some gummy bears, replacing them with simple spheres for distribution purposes.
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"The setup for this simulation is pretty straightforward, so we will go through it while focusing more on some specific tips that you can use when doing general FEM simulations."