Collide with Objects

Converts an object into a collision volume that can interact with smoke/fire/liquid in a fluid container.

See fluid sourcing for information on how the tool transforms the input object into a collision volume for the effect.

Using Collide with Objects

To...	Do this
Create a fluid container	See Smoke Container, Flamefront Container, and Liquid Container.
Fill a fluid container	See Source from Surface, Source from Points, and Source from Volume.
Create a collision volume	Select the object you want to turn into a collision volume. On the Populate containers tab, click the Collide with Objects tool. Select the fluid container you want to collide and press Enter.

The shelf tool adds a Fluid Source surface node to the object to convert its geometry into an appropriate volume, then imports the volume into the DOP network using a Source Volume node.
Most “populate containers” defaults are configured for a sphere with a radius of 1 unit. For much smaller or larger volumes, you may need to change settings on the Fluid Source surface node created by the shelf tool. The Sample Radius, Edge Location and Feather Length parameters give extensive control over how everything is sampled into a volume.