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Display control and navigation through the resources offered in the file is done through command line options or hotkeys. Supports viewing 3D models in VTK, STL (Standard Triangle Language), PLY (Polygon File format), GML (CityGML), DCM (DICOM), EX2 (Exodus 2), PTS (Point Cloud), OBJ (Wavefront), GLTF/GLB (GL), 3DS (Autodesk 3DS Max) and VRL (VRML). For gltf/glb, 3ds, wrl, and obj formats that include scene information (lights, cameras, textures, characters), the scene specified in the file is displayed, and for formats that contain only geometry information, a default scene is generated. Can be used for rendering
OpenGL or ray tracing engines available in VTK.
Source: opennet.ru