2008

Adjusting the range to analyze:
Above: Correct range for a scene
Middle: Too narrow a range
Below: Too great a range
Narrowing the range to focus on a single object
General Guidelines for Physical Scale Values
■ If you use only
Photometric lights on page 4951 , IES Sun on page 4969 , and
IES Sky on page 4973 , the Physical Scale value is disregarded, and you don't
need to change it.
■ If you use
Standard lights on page 4925 , the Physical Scale value acts as a
conversion scale that the radiosity engine uses to calculate energy. Set it
to the equivalent of the brightest light source in the scene. This will set
the appropriate conversion scale for reflections, self-illumination, and all
other non-physically based elements a 3ds Max material offers.
However, if you use the Affect Indirect Only flag in the
Logarithmic
Exposure Control
on page 6540 , you don’t need to worry about the physical
scale setting.
Spectrum bar Shows the spectrum-to-intensity mapping. The numbers below
the spectrum range from the Minimum to the Maximum settings.
When rendering with pseudo color, the spectrum bar is displayed beneath
the pseudo color image, labeled either Luminance or Illuminance.
6558 | Chapter 19 Effects and Environments