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76 Chapter 17: Rendering

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 r adiosity mesh

elements in world units.

Note: Transparent, 2–sided, and translucent

objects ’ faces are counted twice.

Mes h El ements—Lists the number of elements in

the mesh processed.

Lighting Analysis

Selec t an obj ect that has radiosity solution information. >

Rendering menu > Advanced Lighting > Lighting Analysis

To query light levels, analyze the data, and

produce reports, use the Lighting Analysis dialog.

This dialog provides rendering data on material

reflectance, transmittance, and luminance.

For example, a lighting eng ineer m ight need to

know if light fixtures in a scene provide an even

level of illumination on the walls of a building. The

engineer uses the L ighting A nalysis dialog after

placing the lights in the ceiling and processing

radiosity. The engineer inspects the light levels

and m aterial reflectance in the scene and then

adjusts the brightness of lights, changes un its, or

reduces material reflectance.

To use the Lighting Analysis tools, a radiosity

solution must be calculated and displayed

in the scene. For better feedback, use it in

conjunction with the Pseudo Color Exposure

Control (page 3–300).Thistoolmapsluminances

or illuminances to pseudo colors that show the

brightness of the values 3ds Max converts.

Tip: Yo u c a n a l s o e x p o r t LogLUV TIFF files (page

3–634) or PIC files (page 3–628) for analysis by

other software; do this by using the Lighting Data

Exporter utility (page 3–303).