Properties Overrides - Arnold for Houdini
An Arnold procedural will generate geometry at render time, and it possible to override some of the properties of all the generated shapes. To do this, you must activate the left-most check box for each property you want to override.
Motion Blur parameters
Visibility parameters
Normals parameters
Only a subset of the geometry properties can be overridden. Please refer to the Motion Blur, Visibility and Normals property help pages for a full description.