Steve Upstill

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Steve Upstill
CitizenshipUnited States of America
Alma mater
  • University of South Florida
  • University of California, Berkeley
Known forTone Mapping, RenderMan Shading Language
Scientific career
FieldsComputer graphics
ThesisThe Realistic Presentation of Synthetic Images: Image Processing in Computer Graphics (1985)
Doctoral advisorBrian Barsky
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  • Computer scientist
  • Computer graphics researcher

Steve Upstill (born 1954) is American computer scientist and computer graphics researcher. His Seminal 1985 PhD dissertation made several fundamental contributions to tone mapping, including sigmoid curves for contrast mapping, loss of acuity for low light conditions, loss of contrast for low light conditions, and loss of saturation and blue shift for low light conditions[1]. After graduation he worked at Pixar and wrote the book The Renderman Companion, a popular and influential book among computer graphics practitioners and researchers.[2] This book was the only book on Renderman available for almost a decade and helped cement Renderman's widespread adoption in the industry[3] [4]


  1. Thompson, William; Shirley, Peter; Ferwerda, James (2012). "A Spatial Post-Processing Algorithm for Images of Night Scenes". Journal of Graphics Tools.
  2. Upstill, Steve (1990). The Renderman Companion. Addison Wesley. ASIN B001E3NKOA.
  3. Apodaca, Anthony; Gritz, Larry (1999). Advanced Renderman. Morgan Kaufmann. ISBN 1558606181.
  4. Kesson, Malcom (2008). "Pixar's Renderman Course". ACM SIGGRAPH Asia.

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