OBJ files are used by wavefront's advanced visualizer application to define and store the geometric objects. Backward and forward transmission of geometric data is made possible through OBJ files. Both polygonal geometry like points, lines, texture vertices, faces and free-form geometry (curves and surfaces) are supported by OBJ format. This format does not support animation or information related to light and position of scenes.
Additive manufacturing file format (AMF) defines open standards for objects description in order to be utilized by additive manufacturing processes such as 3D printing. CAD programs use the AMF file format by making use of the information such as geometry, color and material of the objects. AMF is different than STL format as the lateral does not support color, materials, lattices, and constellations.