You should notice a subtle difference
between Figure7.74 and Figure 7.72, which shows the wheel with no reflections. You
can adjust the Reflection Amount to taste.
The mapped reflection helps give the wheel more substance as it makes the material more
convincing when rendered. A true reflection, as you will see with raytracing in Chapter 11
???3ds Max Rendering???, will give you more accurate reflections, provided you are rendering
Figure 7.74
The wheel rendered
with mapped
reflections
mapping the rocket ?– 341
in a created environment, which we are not. Figure 7.75 shows an example of a raytraced
reflection and rendered in a simple 3D room. The wheel on the left is the fake mapped reflection;
the wheel on the right is the raytraced reflection showing the accurate environment.
Applying a Bump Map
We are almost but not totally done with the wheel. The black part of the wheel is only
halfway there. One important feature of the wheel is the bumpiness on the surface (refer
to Figure 7.62 on page 334). This bumpiness changes all the Specular and Reflective properties
on that part of the wheel. Bump mapping is very common in CG. It adds a level of
detail to an object fairly easily by creating bumps and grooves in the surface and giving
the object a tactile element.
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