The Use OpenGL and Use DirectX menu entries are displayed alternative, regarding which renderer is currently selected. A renderer is a piece of software that allows a program to draw a 3D or 2D scene. Windows offers the DirectX and OpenGL renderer, which are both supported by BS Contact.
The Viewpoint menu is available in the following user interface levels:
Trade Show / Standard / Expert
The Use OpenGL menu entry is displayed if BS Contact is currently rendering with the DirectX renderer and the Use DirectX menu entry is displayed if BS Contact is currently rendering with the OpenGL renderer. Please note that the selected renderer does not get into effect before BS Contact is not reloaded. View another VR scene or click on the Reload button of the browser to activate a renderer.