A Globe Overlay which shows terrain.
  Supported | Gets whether the video card supports adding Terrain Overlay objects. Video cards that support OpenGL 1.2 or higher support Terrain Overlay objects. | 
| STK Graphics Primitives | Send comments on this topic. | 
| IAgStkGraphicsTerrainOverlayInitializer Interface | |
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  Supported | Gets whether the video card supports adding Terrain Overlay objects. Video cards that support OpenGL 1.2 or higher support Terrain Overlay objects. |