Houdini 21.0 Shelf tools

Debris Dust shelf tool

Creates a simple RBD simulation that emits dust as the pieces break apart.

On this page

This tool sets up a primary RBD Simulation, which is then used to emit dust on impact. A secondary RBD simulation is also created to generate small-scale debris. It is useful as a template for creating multiple layers of RBD sims and sourcing a pyro simulation from the initial RBD sim.

Pyro and RBD simulation in the viewport. Color space: ACES, Voxels Size: 0.02.

Important Nodes

debris_generator1

The debris_generator1 is a collection of nodes to generate low polygon geometry to use for debris.

debrissource

Both the debris and the dust are created using the debrissource node. This allows for easy control over sourcing from the inside edges of the RBD simulation.

Learning from this example

To...Do this

Replace debris_generator1 with custom-made RBD pieces.

Make sure that new RBD pieces have a unique variant integer attribute. This decides which pieces will be copied to which points using the copytopoints1 node.

Change amount of secondary RBDs

Adjust the Density Scale parameter on the debrissource1 node.

Change the size of secondary RBDs

Adjust Min Value and Max Value parameters on the attribadjustfloat1 node to change the pscale attribute on the points that the debris will be copied to.

Control how long the dust appears

Adjust the Life Span parameter on debrissource2. These particles are given an age attribute and are removed after a specified amount of time.

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.

Technical