The bumps pattern was originally designed only to be used as a normal pattern. It uses a very smooth,
random noise function that creates the look of rolling hills when scaled large or a bumpy orange peel when scaled
small. Usually the bumps are about 1 unit apart.
When used as a normal pattern, this pattern uses a specialized normal perturbation function. This means that the
pattern cannot be used with normal_map , slope_map or wave type modifiers in a normal
statement.
When used as a pigment pattern or texture pattern, the bumps pattern is identical to bozo
or spotted and is similar to normal bumps but is not identical as are most normals when compared to
pigments.
Note: The appearance of the bumps pattern depends on the noise_generator used. The
default type is 2. This may be changed using the noise_generator keyword (See section "Pattern
Modifiers / Noise_generator").
More about "Noise_generator"
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