Lets you map a texture to the fog, which gives the effect of patchiness in the fog’s density. If off, constant density environment fog fills the camera’s view. If on, you can assign a texture to the Layer attribute to create variations in the density and color of environment fog across the camera’s view (that is, in two dimensions). To change the amount that objects within or behind environment fog are obscured, adjust the Saturation Distance attribute and the value of the Color attribute. The Saturation Distance affects how much objects within or behind the fog are obscured. The distance (measured in the scene’s linear working unit) from the camera at which environment fog becomes fully saturated (its color value reaches the Color setting). Color Based Transparency is on by default. If the fog Color is dark (black), turn off Color Based Transparency or the fog is not visible.

If on, objects obscured by environment fog are fully shaded, not just flat-shaded silhouettes. If off, objects obscured by environment fog appear as flat-shaded silhouettes. Change to simulate different effects, such as smog (brown fog), or to create the illusion of great distance (blue fog).

Corona renderer environment fog