The lightspeed automatic interactive lighting preview system

  • Authors:
  • Jonathan Ragan-Kelley;Charlie Kilpatrick;Brian W. Smith;Doug Epps;Paul Green;Christophe Hery;Frédo Durand

  • Affiliations:
  • MIT CSAIL;Industrial Light & Magic;Industrial Light & Magic;Tippett Studio;MIT CSAIL;Industrial Light & Magic;MIT CSAIL

  • Venue:
  • ACM SIGGRAPH 2007 papers
  • Year:
  • 2007

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Abstract

We present an automated approach for high-quality preview of feature-film rendering during lighting design. Similar to previous work, we use a deep-framebuffer shaded on the GPU to achieve interactive performance. Our first contribution is to generate the deep-framebuffer and corresponding shaders automatically through data-flow analysis and compilation of the original scene. Cache compression reduces automatically-generated deep-framebuffers to reasonable size for complex production scenes and shaders. We also propose a new structure, the indirect framebuffer, that decouples shading samples from final pixels and allows a deep-framebuffer to handle antialiasing, motion blur and transparency efficiently. Progressive refinement enables fast feedback at coarser resolution. We demonstrate our approach in real-world production.