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Institute for Data Analysis and Visualization

Author(s): Pellacini, Fabio; Vidimce, Kiril; Lefohn, Aaron; Mohr, Alex; Leone, Mark; Warren, John | Abstract: In computer cinematography, the process of lighting design involves placing and configuring lights to define the visual appearance of environments and to enhance story elements. This process is labor intensive and time consuming, primarily because lighting artists receive poor feedback from existing tools: interactive previews have very poor quality, while final-quality images often take hours to render. This paper presents an interactive cinematic lighting system used in the production of computer-animated feature films containing environments of very high complexity, in which surface and light appearances are described using procedural RenderMan shaders. Our system provides lighting artists with high-quality previews at interactive framerates with only small approximations compared to the final rendered images. This is accomplished by combining numerical estimation of surface response, image-space caching, deferred shading, and the computational power of modern graphics hardware. Our system has been successfully used in the production of two feature-length animated films, dramatically accelerating lighting tasks. In our experience interactivity fundamentally changes an artist's workflow, improving both productivity and artistic expressiveness.

How Has The Incandescent Lightbulb Changed Over The Years?

Incandescent light bulbs aren’t the most energy-efficient bulbs, but they are the originals, and for most of the 20th century, they were the only ones that were commercially available. Incandescent bulbs produce light by resistive heating of a filament enclosed in an oxygen-free glass container. Before Thomas Edison produced the first commercially viable bulb, other people had been working on the design for over 40 years, and development continued throughout the early 20th century.

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