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The RENDERENVIRONMENT command is used to set up fog or depth cue
parameters. The key parameters you’ll set are the color of the fog or depth
cueing, the near and far distances, and the near and far fog percentages.
Fog and depth cueing are based on the front or back clipping planes of your
camera coupled with the near and far distance settings on the Render
Environment dialog box. For example, the back clipping plane of a camera is
active and located 30 feet from the camera location. If you want fog to start
15 feet from the camera and spread away indefinitely, you set the Near Distance
to 50 and the Far Distance to 100.
The density of the fog or depth cueing is controlled by the Near and Far Fog
Percentages. These settings have a range of 0.0001 to 100. Higher values mean
the fog or depth cueing is more opaque.
TIP For smaller scale models, the Near and Far Fog Percentage setting may need
to be set below 1.0 to see the desired effect.
Backgrounds
A background is basically a backdrop that displays behind your model.
Backgrounds can be a single color, a multi-color gradient, or a bitmap image.
2254 | Chapter 46 Render 3D Objects for Realism