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. Author manuscript; available in PMC: 2009 Oct 13.
Published in final edited form as: J Vis. 2006 May 5;6(5):634–648. doi: 10.1167/6.5.8

Figure 7. Examples of Stimuli.

Figure 7

For each roughness level, four surfaces were generated. Here, one of the four is shown for each roughness level r rendered under each of the three punctate illuminant directions.