Houdini 17.5 Shelf tools

RBD Fractured Object shelf tool

Creates a number of RBD Objects from SOP Geometry. These individual RBD Objects are created from the geometry primitive groups.

On this page

The RBD Fractured Object creates multiple RBD objects inside the dynamic operation simulation. It takes the geometry from the given surface operator path and breaks it into pieces according to the group mask. This tool is useful to simulate an object shattering.


This tool is meant to be used with user-defined fractures. It will not break up the surface for you. It will create RBD objects out of the pieces you give it.

Using RBD Fractured Objects

  1. Select the geometry to convert to an RBD fractured object.

  2. Define the pieces to be fractured. For example, using the Shatter tool.

  3. Select the object and click the RBD Fractured Object tool on the Rigid Bodies tab.

  4. Choose whether to use an RBD Packed Object or an RBD Fractured Object.

    RBD Packed Objects are useful for large simulations since they are much faster, use less memory, and are smaller to write to disk. They can also be influenced by POP Forces, such as drag. Packed Objects can not interact with other solvers such as cloth and fluids. They also only work with Constraint Networks, such as the one created by the Glue Adjacent shelf tool.


Once you convert geometry to an RBD fractured object you can only transform, rotate, and scale it when it is on the first frame.

For specific parameter help see the RBD Packed Object or RBD Fractured Object help.

Switching to the dynamics level

  1. Click the Dynamics Select Mode button on the selector and handle controls toolbar.

  2. Click the RBD fracture object in the scene view.

See this example file.

See also

Shelf tools

Using the shelf

  • Customize the shelf

    How to change the look of the shelf, change and rearrange its contents, and create your own shelf tools.

Shelf tabs

  • Create tab

    Tools on the Create tab let you create and place primitives, curves, and null objects in the scene view.

  • Modify tab

    Tools on the Modify tab let you easily customize objects in the scene view.

  • Model tab

    Tools on the Model tab let you edit objects in the scene view.

  • Polygon tab

    Tools on the Polygon tab let you modify polygons in the scene view.

  • Deform tab

    Tools on the Deform tab let you deform objects in the scene view.

  • Texture tab

    Tools on the Texture tab let you texture objects in the scene view.

  • Rigging tab

    The Rigging tab contains tools for creating premade rigs.

  • Muscles tab

    The Muscles tab contains tools for creating muscles.

  • Characters tab

    Tools on the Character tab let you create characters in the scene view.

  • Constraints tab

    Tools on the Constraints tab create a constraint network where you can constrain objects to each other in the scene view.

  • Hair Utils tab

    Tools on the Hair Utils tab let you quickly set up hair and fur on objects.

  • Guide Process tab

    Tools on the Guide Process tab let you influence the placement and orientation of guide hairs by painting skin attributes.

  • Guide Brushes tab

    Tools on the Grooming tab let you add and directly manipulate hair.

  • Terrain FX shelf tab

  • Cloud FX tab

    The Cloud FX tab contains tools for creating cloud effects.

  • Volume tab

    The Volume tab contains tools for creating volume effects.

  • Lights and Cameras tab

    Tools on the Lights and Cameras tab let you create and place lights and cameras in the scene view.

  • Collisions tab

    Tools on the Collisions tab let you create collision objects in the scene view.

  • Particles tab

    Tools on the Particles tab let you create dynamic particle simulations.

  • Grains tab

    The Grains tab contains tools for simulate grains of sand and other granular matter.

  • Vellum tab

    The Vellum tab contains tools for creating different types of vellum effects.

  • Rigid Bodies tab

    Tools on the Rigid Bodies tab let you create dynamic RBD objects in the scene view.

  • Particle Fluids tab

    Tools on the Particle Fluids tab let you create particle based liquids in the scene view.

  • Viscous Fluids tab

    Viscous fluids are FLIP simulations that use a temperature attribute to drive viscosity.

  • Oceans tab

    The Oceans tab contains tools for creating ocean simulations.

  • Fluid Containers tab

    The Fluid Containers tab contains tools for creating pyro, smoke, and liquid containers.

  • Populate Containers tab

    The Populate Containers tab contains tools for creating and removing fire, smoke, and liquid.

  • Container Tools tab

    The Container Tools tab contains tools for manipulating fire, smoke, and liquid.

  • Pyro FX tab

    Tools on the Pryo FX tab let you create simulated smoke and fire effects.

  • Solid tab

    Tools on the Solid tab let you create and modify solid objects.

  • Wires tab

    Tools on the Wires tab let you create flexible dynamic objects in the scene view.

  • Crowds tab

    The Crowds tab contains tools for creating crowds, crowd behaviors, as well as examples.

  • Drive Simulation tab

    Tools on the Drive Simulation tab let you manipulate dynamic objects in the scene view.