User`s guide

Chapter 6 Working with Containers
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Setting the Type of Light Source for a Z Space Composite Container
There are three types of light sources:
• Diffuse Specular: Combines both focused (specular) and diffuse light. Use this light
type to create the appearance of a shiny surface lit by a point light source.
• Spotlight: Simulates the look of a traditional theatrical spotlight.
• Sweep: Creates a linear beam of light that sweeps across your image. The light source is
physically modeled after a light that is infinitely far away. It is also infinitely wide in one
direction and falls off in the other.
Parameter Description
Light X and Light Y Positions the light source in space by moving the light parallel to the
image plane along the X and Y axes.
Adjusting these values can change the shape of the light. For
example, as the light source moves off to the right, the light
becomes more oval and less round in shape. Changing the Light X
and Light Y is analogous to pivoting a theatrical spotlight to follow
a performer on stage
Distance Positions the light source relative to the image plane. Increasing
positive Distance values bring the light source closer to the
viewer.Negative Distance values place the light behind the object
and move the light away from the viewer. If Distance is negative, the
light can be seen only if the object is rotated or displaced so that all
or part of it is behind the light source (that is, the light source always
points in toward the object, never out at the viewer).
Spot X, Spot Y and
Spot Z
Sets the coordinates for the point at which the spotlight is aimed.
Adjusting the Spot parameters does not change the shape of the
light.
Angle Sets the angle of the light. This is analogous to focusing the light.
Edge Falloff Controls the relative softness of the edges of the lit region. Increase
this value to harden the edges of the lit region.
Edge Falloff removes light from the edges of the lit region. To
maintain the size of the region while softening its edges, you need to
increase Angle accordingly.
Color Determines the color of the light.
Intensity Controls the brightness of the light.