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
Additional materials: [lpics_siggraph.mp4]
Available in the Proceedings of SIGGRAPH 2005