This option colors the
passages according to the distance from the
closest part of the cave. This creates a 3D
effect that makes easier to differentiate far
and near passages. As an example, the image
above colors near passages red and far passages
blue. Because of blue has a shorter wave length
than red, your eye has to focus farther away for
the blue passages. This give the illusion of 3D
without the need for special glasses. You also
have the option of draw near passages thick,
which enhances the 3D illusion.
There are also several
standard color schemes available. The color
scheme above colors distant passage light gray
and near passages black. This creates the same
3D illusion when the cave displayed on a white
background or printed on white paper.
This image illustrates
the color scheme used for black backgrounds.
Here the nearby passages are colored white and
the far passages are colored dark gray. You can
also create your own custom color schemes and