CadFaster|QuickStep is a free 3D file viewer with professional-class features. Supports standard file formats such as STEP and HSF. Users may choose between OpenGL and DirectX drivers. CadFaster|QuickStep rendering is highly optimized and user interface is perfect for interactive 3D model navigation. Innovative out-of-core rendering solution ensures that even the largest 3D files can be opened and viewed interactively.