Extract

Three computer laboratory spaces, each with four different lighting conditions, were modelled
and rendered using ‘Lightscape’ software. These computer models were checked for
photometric accuracy by comparing computed luminance values with measurements in the
real situations. Corrections were made to the models where necessary; and then
comparisons were made between subjective assessments for specific viewpoints of screen
images, colour print-out images, and the real situation. Several consistent patterns of
difference were found and are reported.

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