This is a list of the Unix commands provided by BRL-CAD. In the spirit of Unix there are over 400 commands that each do a single thing well and can be used together as you see fit.
fence—make a model of a fence
mged—multi-device geometry editor. Start here.
tire—make a model of a tire
vegetation—make a model of a tree.
rtshot—pass a ray through a model to see what it hits.
g-stl—convert a .g file to a .stl file
g-vrml—convert a .g file to vrml 2.0
rtwizard—Tcl/tk-based front end to the raytracer.
rtedge—Creates line-art renders of models.