Autodesk 12812-051462-9011 User Guide 3 - Page 2886

and intensity of the sun can be calculated based on geographical location, time, and sky condition settings. See also: ■ Skylight on page 8129 ■ Sunlight and Daylight Systems on page 5139 Super Black Super Black limits the darkness of rendered geometry. This option is used for video compositing. When compositing, you need pure black for the background, but overlying objects need to be less than pure black so that you can still see exactly where they are. Also, some video systems have problems with black that has RGB values of 0,0,0, and consider it an "illegal" color. Unless you're sure you need it, leave the Render Setup dialog > Super Black check box off. The scanline and mental ray renderers use the value of the Super Black > Threshold preference setting on page 7769 to determine the maximum darkness of the rendered scene. For example, if you're rendering a heavily shadowed object against a black background, although the background will be rendered as pure black, the deepest shadows on the object will be no darker than the intensity level specified by the Threshold setting (default is 15). NOTE Setting the Threshold value too high can artificially raise low-blended values. This can ruin antialiasing effects in the renderer. Supersampling Supersampling is one of several antialiasing techniques that the software performs. Textures, shadows, highlights, and raytraced reflections and refractions all have their own preliminary antialiasing strategies. Supersampling is an optional additional step that provides a "best guess" color for each rendered pixel. The supersampler's output is then passed on to the renderer, which performs a final antialiasing pass. See also: ■ SuperSampling Rollout on page 5381 Glossary | 8141