These options appear in the Paint Effects Brush Settings window and the Attribute Editor for any brush node.
Use these settings to define how the paint is illuminated. The paint on a stroke behaves like a surface, and therefore requires light for you to see it.
You can use the lights in your scene to illuminate paint (real lights), or you can use a Paint Effects light that only affects the stroke paint and nothing else in the scene.
Turn on Illuminated so that lighting has an effect on the appearance of the stroke paint. You can use the lights in your scene to illuminate strokes or you can use a Paint Effects light. See Real Lights, next.
If Illumination is turned off, then strokes are painted in the colors you specify, with no shaded areas or specular highlights, even if there are lights in the scene.
By default, Illuminated and Real Lights are forced on in the scene in the Paint Effects Globals options (see Force Real Lights in the Scene section of Paint Effects Globals Options).
This option is available only when Illuminated is turned on. Turn on Real Lights to use the lights in the scene to determine the position of shading and specular lights on the paint.
Turn off Real Lights to use a directional Paint Effects light. You can define its direction in the Light Direction attribute, but you cannot modify any other attributes (for example, intensity). When this option is turned off, lights in the scene have no effect on the paint.
This attribute is useful for creating a thick/thin effect for line modulation. Lighting Based Width controls the degree to which the line (tube) width is modulated by the light intensity. Brighter regions will be thinner, whereas shadowed and dark regions will have full width lines (tubes). Using negative values can have the reverse effect. The lighting used is a diffuse illumination that is relative to the local surface normal painted on by the stroke.
These settings are available only when Illuminated is turned on and Real Lights is turned off. They define the direction of the Paint Effects light.
This setting is available only when Illuminated is turned on. The Translucence value controls how much the paint transmits and diffuses light. Light shining on the back of translucent paint can light up the front, although you still may not be able to see through it. To make the paint completely opaque, set this to value 0. To allow more light to diffuse through, set the value closer to 1.
This setting is available only when Illuminated is turned on. The Specular value controls the brightness of the shiny highlights on illuminated paint. A value of 0 produces no highlights, while higher values produce brighter highlights.
This setting is available only when Illuminated is turned on. The Specular Power value controls how focused the specular highlights are. Lower values spread the highlight over a larger area. Higher values focus the highlight into a small dot.
This setting is available only when Illuminated is turned on. It defines the color of the specular highlights on your paint. Use the slider to adjust the specular color value. Click the Specular Color color box and select the specular color from the Color Chooser.