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Lighting Analysis 75
Light Object—
Lists the number of light objects
processed.
Note: Self-illuminated objects count as one light
per face.
Meshing Size—Lists the size of radiosity mesh
elements in world units.
Note: Tr ansparent, 2–sided, and translucent
objects’ faces are counted twice.
Mes h El ements—Lists the number of elements in
the mesh processed.
Lighting Analy sis
To query light levels, analyze the data, and
produce reports, use the
Lighting Analysis dialog
(page 3–75)
. Thisdialogprovidesrendering
data on mater ial reflectance, transmittance, and
luminance.
For example, a lighting engineer might need to
know if light fixtures in a scene provide an even
level of illumination on the walls of a building. The
engineer use s the Lighting Analysis dialog after
placing the lights in the ceiling and processing
radiosity. The eng ineer inspects the li ght levels
and m aterial reflectance in the scene and then
adjusts the brightness of lights, changes units, or
reduces material reflectance.
Note: You can also use the
Pseudo Color Exposure
control (page 3–296)
to do lighting analysis. This
tool maps luminances or illuminances to pseudo
colors that show the brightness of the values
3ds Max con v erts. You can also export
LogLUV
TIFF files (p age 3–684)
or
PIC fi les (page 3–677)
foranalysisbyothersoftware;dothisbyusingthe
Lighting Data Exporter utility (page 3–299)
.
Lighting Analysis Dialog
Select an object that has radiosity solution information. >
Rendering menu > Advanced Lighting > Lighting Analysis
The Lighting Analysis dialog allows you to
query light levels in the scene. You can obtain
information about the luminance, illuminance,
reflectance, and t ransmittance at a specific point,
or the aver age values over an entire object.
Note: To use the Lighting Analysis tools, a radiosity
solution must be calculated and displayed in the
scene. For better feedback, use it in conjunction
w ith the
P seudo Color Exposure Control (page
3–296)
.
See also
Modeling Global Illumination with Radiosity
(page 3–50)
Radiosity Workflows (page 3–56)
Radiosity Cont rols (page 3–60)
Radiosit y Preferences (page 3–866)
Lighting Data Exporter Utility (page 3–299)
Interfa ce
Statistics group
Displays the radiosity solution lig hting statist ics
for the object you select.
Qua nti ty Indicates the desired photometric value: