The default action is to create a complete rib file containing default camera, lights, etc.
-nname
Set name for rendered TIFF file (default "geom.tiff") or framebuffer window (default "geom.rib").
-Br,g,b
Set background color, each component ranges from 0 to 1. Default is no background.
-wwidth
Set width of rendered frame, in pixels.
-hheight
Set height of rendered frame, in pixels.
-f The .rib file renders to on-screen framebuffer instead of TIFF file.
-g Output geometry only, no world, no world block.
-b Encapsulate geometry-only into a world block. This is the configuration to define a RIB file 'clip
object' via the Quick RenderMan specification. Ignores -nBwhf.