STL (STereoLithography) is a file format native to the stereolithography CAD software. This file format is supported by many other software packages; it is widely used for rapid prototyping, 3D printing and computer-aided manufacturing. STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common, since they are more compact.
PAR is a CAD format that generates 3D object layouts. Solid Edge, a 3D CAD system from Siemens Digital Industries Software, uses the .par extension for its part files, including their geometric forms, appearance, and structural elements.
The PAR file can be combined with other Solid Edge parts to a single assembly (ASM file).
A CAD file is an output of a CAD software, containing key information about the designed object: its geometry and topology representation, 3D model hierarchy, metadata, and visual attributes depending on the format of the file.
Read moreIn the sixth part of the series, we cover the ubiquitous mesh format tying 3D and reality through 3D printing applications
Read moreCAD Exchanger imports and tesselates FBX, glTF, OBJ, PLY, and STL files, making them ready for further optimization by RapidCompact.
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