Abstract: Unordered list operations are used to create and modify ordered lists of components. Each list operation specifies an intention to change some aspect of an ordered list, such as the addition or removal of components or a change in the sequence of components. List operations are associated with intrinsic and extrinsic time-independent attributes. Multiple users can collaborate on an ordered list by specifying their own list operations. List operations are cumulative and do not destructively overwrite list operations from previous pipeline activities. An embodiment of the invention interprets list operations in a time independent manner using intrinsic and extrinsic list operation attributes. Because list operations are processed in a time-independent manner, multiple users may collaborate in any order on the creation of an ordered list, including simultaneously editing the ordered list, and still obtain consistent results.

Abstract: Color contributions from one or more light sources to scene entities are separated from the scene entities' respective unilluminated colors. This enables the color contributions of light sources as well as scene entities' unilluminated colors to be adjusted or modified independently of each other. Light source color contributions may be combined by groups of light sources, by light source to scene entity interaction, and/or by light source type. Adjustments to light source color contributions and/or unilluminated colors may be performed using a saturation varying color space or general tone mapping techniques. The light source color contributions and unilluminated colors of scene entities may be employed in contexts including an image processing application and within or as a shader of a renderer.