Graphics Programs Reference
In-Depth Information
FIGURE 21.13
The lights appear
in the ceilings of
the building to
the right.
USING PROCEDURAL MAPS
Procedural maps
are texture maps that are der ived mathematically rather than from a bitmap image. T The
advantage of a procedural map is that it gives a more natural representation of a material. For example,
if you cut a notch out of a box that uses a wood procedural map, the notch appears correctly with the
appropriate wood grain. Do the same for a box that uses a bitmap texture map and the grain doesn't
appear correctly. With a bitmap texture map, the same image is placed on all four sides of the box, so
cuts don't show the grain properly.
The bitmap texture map
uses the same image
for all sides.
The procedural map
shows the grain
properly in the notch.
AutoCAD offers several types of procedural maps. You can select them from the Material Browser
for materials such as ceramic, concrete, masonry, plastic, stone, and wood.
Using the Sun and Sky Simulation
You can set up AutoCAD to simulate realistic lighting effects in exterior views. Earlier in this
chapter, you added a distant light to approximate the light bouncing off the ground. AutoCAD's
