RsView can be called from a command line window with one or more project file names:
RsView myhouse.r3d mylightning.r3d ..
Projects are all loaded in and combined for browsing.
In addition to this, the program accepts the following startup options:
Specifies the default name of the project to be loaded.
Specifies custom plug-in folder from which the plug-in modules should be read. The default folder is 'Plugins' (in program's home folder).