Developer Milan Suk has released BulletSOP 2.0, a free tool for creating large rigid-body simulations inside Houdini using the Bullet physics toolset.
BulletSOP includes a number of advanced simulation features, including support for convex and compound hulls, geometry decomposition, instancing, and constraints, collision groups, point radius forces and object forces.
The tool comes with a set of sample scenes, and is available with Houdini 12.5.376 for Windows or Linux: older or later builds may work, but Suk says that he can’t guarantee compatibility.
The results look good: a video created with an earlier beta of the tool shows 100,000-object simulations, and Suk has just posted WIP videos of a more complex destruction shot for the BulletSOP trailer.
Updated 23 July: Milan Suk has reduced the price of the BulletSOP source code from $4,999 to $599. The binary itself remains free.
Read the original release thread (More information about the tool)