BRL-CAD Home Page The BRL-CAD package is a powerful Constructive Solid Geometry (CSG) solid modeling system with over 20 years development and production use by the U.S. military. BRL-CAD includes an interactive geometry editor, parallel ray-tracing support for rendering a By jdrsantosin Public bookmarkswith 3dcadcsggraphicopen_sourcesoftwareby 2 users (all private)