Perspective View
By default, all 3D Views use orthographic projection to the screen. When the scene is sparse, Perspective View Mode offers more realistic
rendering. In this mode objects which are further from the viewer appear smaller on the screen.
Use Advanced > View > Perspective context menu (right click) option to turn on/off perspective rendering.
Use IView_DG.Get/SetProjectionType()
to change or query the current projection type programmatically.
See Light sample for an example.
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