Modifying a bump texture
The bump texture is too crater-like to be a convincing orange. The bumps are
too numerous and too deep. A quick way to fix this problem is to scale up the
entire texture. To interactively position a 3D texture
Double click the place3dTexture1 swatch, to the left of the Brownian
color swatch.
This node controls the 3D texture’s position, scale, and rotation. The
visual display of this node is a large cube that surrounds the sphere in
the scene view. This is the texture placement cube.
Click the Interactive Placement button in the Attribute Editor. A
manipulator appears for the texture placement cube.
In the scene view, click on the center scale box to activate the center
scale option. Scale the whole texture placement cube to about twice the
original size (until the Scale attribute values are about 2).
Now when you render, the bumps on the surface appear wider and
smoother, like the bumps on an orange skin. For example, the bumps in
the area surrounding the highlight do not appear to be as deep as they
were before you scaled the texture.
Scaling a texture placement cube is a common way to tune the texture’s
display. Scaling does not actually change the pattern, but enlarges or
shrinks it relative to the surface.
Now that you’ve changed the surface texture through scaling, move the texture
placement cube above the sphere drag the green arrow up,
to see how that affects the texture.
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