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+ Solid modeling is distinguished from other forms of geometric modeling by an emphasis on being physically accurate, fully describing 3D space. +
++ Raytracing is central to BRL-CAD as a means for performing geometric analysis and for rendering images for visualization purposes. +
++ BRL-CAD supports geometry in boundary representation NURBS format but also supports robust solid ray-tracing of NURBS geometry. +
++ BRL-CAD can run series of commands piped in or redirected to it via standard input, instead of re-invoking BRL-CAD for each command. +
++ BRL-CAD's hardware support includes everything from minimal laptops and desktops to gigantic distributed supercomputers. And it can be executed on most desktop operating systems. +
++ While now a fully hybrid modeling system, BRL-CAD has its roots in CSG modeling with implicit primitives. +
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