There are also many features of the display that a user will want to control, overriding the defaults built into the system. All options and arguments are case-insensitive.
Feet is the default unit.
A warning is printed for each unknown option encountered. The application continues forward regardless. This allows configuration files to be created that provide options geared toward applications compiled with different versions of the CAVE Library. Hopefully there will be some changes to allow this in the next version of the library. There are a number of separate coordinate systems involved in a VR system.