func_lod
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Note:The fading is not always consistent; brushes may suddenly "pop" into view depending on where the player is looking. This happens because of a hardware issues with rendering translucent materials. Low-end cards will fade nearer than the distance specified, and smaller objects fade nearer than a larger object with the same fade distance.
Bug:Weapons from 
Black Mesa with muzzle dynamic lights causes strange visual bugs when player in End fade radius and out of Start fade radius. Example.
Important:As this entity still counts as an edict, overuse of this entity can be more expensive than simply using func_detail. If the fade-out is necessary, consider converting the geometry to a MDL and using prop_static instead.
Note:For Keyvalues and Inputs affecting brush rendering, see Brush entity/Rendering related keyvalues and inputs
Note:This entity can be only changed from solid to nonsolid when using AddOutput.
 Class hierarchy
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| CFunc_LOD |
| func_lod.cpp
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func_lod is a brush entity available in all 
Source games.
It is a bmodel that fades out over a specified distance. Useful for creating world details that don't need to be drawn far away, for performance reasons.
Note:The fading is not always consistent; brushes may suddenly "pop" into view depending on where the player is looking. This happens because of a hardware issues with rendering translucent materials. Low-end cards will fade nearer than the distance specified, and smaller objects fade nearer than a larger object with the same fade distance.Bug:Weapons from Black Mesa with muzzle dynamic lights causes strange visual bugs when player in End fade radius and out of Start fade radius. Example.Important:As this entity still counts as an edict, overuse of this entity can be more expensive than simply using func_detail. If the fade-out is necessary, consider converting the geometry to a MDL and using prop_static instead.Keyvalues
Note:For Keyvalues and Inputs affecting brush rendering, see Brush entity/Rendering related keyvalues and inputs- Name (targetname) <string>
- The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g.
parentnameortarget).
Also displayed in Hammer's 2D views and Entity Report.See also: Generic Keyvalues, Inputs and Outputs available to all entities
- Disappear Distance (DisappearDist) <integer>
- Distance at which these brushes should start fading out. The finish fading out distance is value from this property +800, you can change it by setting other value for lod_TransitionDist console variable. Since
Left 4 Dead, fading out distance controlled by DisappearMaxDist property. - Min Disappear Distance (DisappearMinDist) <integer> (in all games since )
- Distance at which these brushes should start fading out.
- Max Disappear Distance (DisappearMaxDist) <integer> (in all games since )
- Distance at which these brushes should finish fading out.
- Non-solid (Solid) <boolean>
- Set whether or not these brushes should collide with other entities.
Note:This entity can be only changed from solid to nonsolid when using AddOutput.