Three-dimensional image compositing on a GPU utilizing multiple transformations

A system including:

• a buffer;
• and
• a processor configured to identify a plurality of image elements to be rendered within a three-dimensional image, wherein the processor is configured to identify a set of light sources according to which lighting and shadowing are to be computed within the three-dimensional image the processor configured to transform the plurality of image elements from an object space, defined by an object coordinate system, to an intermediate space defined by an intermediate coordinate system, wherein for each image element of the plurality of image elements, the processor is configured to generate a shaded image element, wherein as part of the configuration to generate the shaded image element the processor is configured to render the respective image element into the buffer for each light source of the set of light sources so as to accumulate lighting effects, particular to the image element, within the buffer as the shaded image element, the processor configured to transform the shaded image elements from the intermediate space to an eye space defined by an eye coordinate system through a world space, and wherein for each image element of the plurality of image elements, the processor is configured to render at least one effect with respect to the shaded image element to generate a modified image element.