2008

LTLI Files
The LTLI file type is the file format for photometric data created by the Danish
Illuminating Laboratory. It is used primarily in Scandinavian countries.
Luminance
Luminance is the value of light reflected off a surface. It is a measure of how
bright or dark we perceive the surface.
Luminous Flux
Luminous flux is the quantity of light energy per unit time arriving, leaving,
or going through a surface. The lumen (lm) is the unit of luminous flux in
both the International System (SI) of units and in the American System (AS)
of units. If you think of light as particles (photons) moving through space,
then the luminous flux of a light beam arriving at a surface is proportional to
the number of particles hitting the surface during a time interval of 1 second.
Luminous Intensity
Luminous intensity is the light energy per unit time emitted by a point source
in a particular direction. Luminous intensity is used to describe the directional
distribution of a light source, that is, to specify how the luminous intensity
of a light source varies as a function of the outgoing direction. The Candela
(cd) is the unit of luminous intensity.
LZF Files
LZF (Lens Effects Flare) files allow you to store all of the settings for a Flare
effect in one file. The settings are also saved with the MAX file; however,
saving them to a separate file allows you to use the same Lens Effects settings
in different scenes, and also allows you to share settings with other 3ds Max
users.
Glossary | 7833