Obstruction model used in lighting computations.
| Member | Value | Description | 
|---|---|---|
| eLightingObstructionCbShape | 0x0 | The lighting obstruction model is the surface of the central body ellipsoid. | 
| eLightingObstructionAzElMask | 0x1 | Lighting obstruction is computed using the object's Az-El mask if defined, else uses the object's ground model. | 
| eLightingObstructionTerrain | 0x2 | Lighting obstruction is computed using terrain data. | 
| eELightingObstructionGroundModel | 0x3 | The lighting obstruction model is the object's ground model as used in the line-of-sight constraint computation. | 





