This procedural will load a RIB file at render time.
The RIB archive.
The bounding box controls let you specify a bounding box for the referenced geometry. Only when this bounding box is "on screen" will RenderMan load the referenced geometry. You can set Bounding Box to No bounding box required, in which case RenderMan will always load the references geometry regardless. You can also specify the bounding box by referencing the SOP’s bounding box in the SOP Bounds parameter.
The geometry whose bounding box you want to reference.
The minimum bounding box dimensions, when setting explicit bounds.
The maximum bounding box dimensions, when setting explicit bounds.