Autodesk LIGHTSCAPE, Manual

Page: 16 / 362

Introduction 1
8
Lightscape
square meter. The corresponding AS unit is the foot-
candle (fc), equivalent to 1 lumen per square foot.
Part of the light incident on a surface is reflected
back into the environment.
Luminance is the light
reflected off a surface in a particular direction and is
the quantity converted to display colors to generate a
realistic rendering of the scene. Luminance is
measured in candelas per square meter or per square
inch. The
candela was originally defined as the lumi-
nous intensity emitted by a single wax candle.
Finally, luminous intensity is the light energy per unit
time emitted by a point source in a particular direc-
tion. The unit of measure of luminous intensity is the
candela . 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.
About Lightscape
Documentation
The Lightscape manuals are comprehensive docu-
ments that contain all the information you need to
learn and use Lightscape efficiently and effectively.
The documentation for your Lightscape software
includes:
• Lightscape 3.2 User’s Guide
printed manual and on-
line file
• Learning Lightscape 3.2 printed manual and online
file
• Online Help
• Installing LSnet online file
• README.TXT (an online text file in your Light-
scape home directory).
The Lightscape 3.2 User’s Guide provides explana-
tions of the techniques and concepts required to set
up, process, and render a Lightscape solution.
Learning Lightscape provides step-by-step examples
of the procedures discussed in this manual.
The Lightscape Online Help system provides topic-
based information as well as reference information
about the main interface elements.
Using This Guide
This guide is designed to provide information both
by topic and in the order of a typical workflow. More
experienced users can use the guide for reference,
turning directly to sections of specific interest.
The following typographical conventions are used
in this manual:
Convention: Description:
Courier
Bold
Used for program commands,
such as
lid2cibse
or
lid2ies
.
Italic Used for emphasis and when a
new term is introduced.
▲
Used to indicate a warning.
| Used to indicate that you are to
choose an item from a menu or
submenu. For example,
File | Parameters | Load tells you
to choose Load from the Parame-
ters submenu of the File menu.