BRL-CAD | Open Source Solid Modeling

BRL-CAD | Open Source Solid Modeling:

"BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for robust geometric representation, with more than 20 years of active development."

'via Blog this'