You can use Rigid Sets to create simulations that contain a large amount of rigid body objects without the inherent performance loss that normally accompanies a large solve. If you create a Rigid Set from a group of objects, you are creating one mesh (rigidsolved), which then behaves like a single rigid body.
When you work with simulations that rely on numerous objects in the solve, for example, a wall made of thousands of bricks, or a collapsing rock face, the number of objects processed has a significant effect on the performance of the simulation. Additionally, it can be tedious to select each object in the Outliner.
In these cases, it is best to create a Rigid Set that comprises all of the Rigid Body objects included in the solve.
Avalanche effect using a Rigid Set containing 1000-fragment objects
When you group objects in a Rigid Set, you can:
- Assign them a rest position of a simulation to a point in after which the solve has already started,
- Use the Glue constraint to bond the rigid bodies together, making them behave as a single piece of geometry,
- Benefit from GPU acceleration that is not available to regular Bullet rigid bodies.