2013

Table Of Contents
inverse square of the distance, or not at all. By default, the attenuation is set
to None.
Point Lights in Photometric Workflow
A free point light can have photometric distribution properties. The attenuation
for a photometric point light is always set to inverse square.
When the LIGHTINGUNITS system variable is set to 1 (American units) or 2
(International SI units) for photometric lighting, additional properties are
available for a point light. On the Properties Inspector palette, photometric
properties are
Lamp Intensity. Specifies the inherent brightness of the light. Specifies
the intensity, flux or illuminance of the lamp.
Resulting Intensity. Gives the final brightness of the light. (Product of
lamp intensity and intensity factor. Read-only.)
Lamp Color. Specifies the inherent color of the light in Kelvin temperature
or standard.
718 | Chapter 13 Render Drawings