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1666 Chapter 16: Material Editor, Materials, and Maps
greater the random effect. This percentage value
can range from 0 to 100. At 0, the color swatch
or the map completely determines the cell color.
Default=0.
Division Colors group
These controls specify the color of the divisions
between cells. C ell divisions are a ramp between
two colors or two maps.
Co lor swatches—DisplaytheColorSelectorfor
choosing a cell division color.
Ma p buttons—Assigns a map to one of the cell
division colors.
Check boxes —When on, enables the associated
map. When off, disables the assoc iated map (the
division color reverts to the color swatch).
Cell Chara cteristics group
Thesecontrolschangetheshapeandsizeofthe
cells.
Circular / Ch i p s —With Circular, the cells are
circular. This gives a more organic, or bubbly
look. With Chips, the cells have linear edges.
This gives a more chipped or mosaic appearance.
Default=Circular.
Size—Alterstheoverallscaleofthemap.Adjust
this value to fit the map to your geometr y.
Default=5.0.
Spread—Altersthesizeofindividualcells.
Default=0.5.
B ump S moothing—When you use a cellular map as
a bump map (page 2–1506), you might encounter
aliasing or jagginess at the boundaries of the cells.
If this occurs, increase this value. Default=0.1.
Fr actal —Defines the cell ular pattern as a fractal,
thus enabling the three following additional
parameters. Default=off.
Iterations—Sets the number of t imes the fractal
function is applied. Caution: Increasing this value
increases rendering time. Default=3.0.
Adaptive—When on, the number of fractal
iterations is set adaptively. That is, the number
of iterations increases the closer the geometry is
to the scene’s point of view, and decreases in the
distance. This reduces aliasing and a lso saves t ime
while rendering. Default=on.
Roughness —When you use the Cellular map as a
bump map (page 2–1506), this parameter controls
how rough the bumps are. When Roughness is
zero, each iterat ion is half the strength of the
previous iteration, and half the size. As Roughness
increases, each iteration is closer in strength and
size to the previous iteration. When Roughness
is at its maximum value of 1.0, each iteration is
thesamesizeandstrengthastheprevious. In
effect, this turns off the fractalization. Roughness
hasnoeffectunlessIterationsisgreaterthan1.0.
Default=0.0.
Thresholds group
These controls affect the relative size of cells and
divisions. They are expressed as norma lized
percentages(0to1)ofthesizesspecifiedbythe
default algorithm.
Low—Adjusts the size of the cells. Default=0.0.
Mid—Adjusts the size of the first division color,
relative to the second. Default=0.5.
High—Adjusts the overall size of divisions.
Default=1.0.