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Enter ? to display a list of color names. Enter a text string using wild card
characters to display a partial listing of color names, or an asterisk (*) to display
all the possible choices.
If you enter k, you can specify the color of the light based on a Kelvin
temperature value.
Exit Exits the command.
Shadow
Makes the light cast shadows.
Off Turns off the display and calculation of shadows for the light. Turning
shadows off increases performance.
Sharp Displays shadows with sharp edges. Use this option to increase
performance.
Soft Mapped Displays realistic shadows with soft edges.
Map Size Specifies the amount of memory that should be used to calculate
the shadow map.
Softness Specifies the softness to use to calculate the shadow map.
Soft Sampled Displays realistic shadows with softer shadows (penumbra)
based on extended light sources.
Shape Specify the shape of the shadow by entering s and then the dimensions
of the shape. (For example, the radius of the sphere or the length and width
of a rectangle.)
Attenuation
Attenuation Type Controls how light diminishes over distance. The farther
away an object is from a point light, the darker the object appears. Attenuation
is also known as decay.
■ None. Sets no attenuation. Objects far from the point light are as bright
as objects close to the light.
■ Inverse Linear. Sets attenuation to be the inverse of the linear distance
from the light. For example, at a distance of 2 units, light is half as strong
as at the point light; at a distance of 4 units, light is one quarter as strong.
The default value for inverse linear is half the maximum intensity.
■ Inverse Squared. Sets attenuation to be the inverse of the square of the
distance from the light. For example, at a distance of 2 units, light is one
quarter as strong as at the point light; at a distance of 4 units, light is one
sixteenth as strong.
1930 | Chapter 20 T Commands