Rt

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The rt command is the primary ray-tracer in BRL-CAD. The rt command can generate a variety of visualizations for a given BRL-CAD geometry database model depending on the selected lighting model and options used. The rt command can be invoked both on the command-line and on the mged command-line and is the default ray-tracer specified in MGED saveview scripts and Tools->Raytrace renderings.