User:Brandished/Sandbox 5
light
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 This creates an omnidirectional light source, useful for adding additional light to a room. This is not commonly used as a primary light source, despite what it's name might seem to imply.  | 
light_spot
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 This creates a cone based light source in game. This is the most commonly used lighting entity.  | 
light_environment
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 This entity causes all tools/skybox textures to emit light from the angle specified inside the property settings. This is primarily used for outdoor sky lighting. Only one light_environment should be used inside a level.  | 
env_sun
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 This does not emit light itself, but is used to create the appearance of a sun or moon in an outdoor environment.  | 
point_spotlight
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 Used for creating a halo and cone shaped "light beam" effect that is usually found on spotlights.  | 
env_fire
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env_embers
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 Creates the floating fire embers particle effect. The image on the right was created using a weak light entity just below an env_fire.  |