2012

Table Of Contents
LINEARBRIGHTNESS
Controls the brightness level of the viewport when using default lighting or
generic lights.
LINEARCONTRAST
Controls the contrast level of the viewport when using default lighting or
generic lights.
LOGEXPBRIGHTNESS
Controls the brightness level of the viewport when using photometric
lighting.
LOGEXPCONTRAST
Controls the contrast level of the viewport when using photometric lighting.
LOGEXPDAYLIGHT
Controls if the exterior daylight flag is enabled when using photometric
lighting.
LOGEXPMIDTONES
Controls the mid tones level of the viewport when using photometric lighting.
RENDERUSERLIGHTS
Controls whether to override the setting for viewport lighting during
rendering.
SUNSTATUS
Turns on and off the lighting effects of the sun in the current viewport.
IES Standard File Format
IES standard file formats can be created and modified.
You can create a photometric data file in the IES format using the IES
LM-63-1991 standard file format for photometric data. (IES stands for
Illuminating Engineering Society.) However, only the information relevant
to AutoCAD is described here. For a complete description of the IES standard
file format, see IES Standard File Format for Electronic Transfer of Photometric
Data and Related Information, prepared by the IES Computer Committee
(http://www.iesna.org).
The luminous intensity distribution (LID) of a luminaire is measured at the
nodes of a photometric web for a fixed set of horizontal and vertical angles.
2170 | Chapter 44 Add Lighting to Your Model