8

Pseudo Color Exposure Control 297
A display of illuminance shows that it is the s ame for all
three spheres.
A display of luminance shows that the two spheres on the
leftreflectaboutthesameamountoflight,butthedarker
sphere on the right reflects little light except for its highlight.
See also
Environment Panel (page 3–268)
Inter face
Display Type group
Quantit y—Chooses the value being measured.
• Illuminance (the default) displays values of
light incident on surfaces.
• Luminance displays values of light reflected off
surfaces.
Style—Chooses t he way to display values.
• Colored (the default) shows a spectrum.
• Grayscale shows g ray tones that range from
white to black.
The spectrum bar displays the values the
rendering will use.
Pseudo color display style:
Left: Grayscale
Right: Colored scale
Scale—Chooses the technique used to m ap values.
• Logarithmic (the default) us es a logarithmic
scale.
• Linear u ses a linear scale.
The Logarithmic scale is useful when the
illumination of the surfaces of interest is low
compared to the maximum illumination in the
scene.