Bright fog, linear fade and filter maps
A complete description of these is more proper to discussions of Attributes, Textures, and Brushes. Here, note that shafts and glows of lights can be simulated with bright fog objects. For example, a long tapered cylinder colored pale yellow or blue with a fog depth several times greater than its width and made bright can be used as a car's headlight beam. This can be attenuated through either the linear texture used in its filter mode, or with a grey spread brush used as a filter.
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