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1476 Chapter 16: Material Editor, Materials, and 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 associated map (the
division color reverts to the color swatch).
Cell Chara cteristics group
Thesecontrolschangetheshapeandsizeofthe
cells.
Circul ar / Chi p s—With Circular , the cells are
circular. T his 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=.05.
B ump S moothing—When you use a cellular map as
a
bump map (page 2–1347) , you might encounter
aliasing or jagginess at the boundaries of the cells.
If this occurs, increase this value. Default=0.1.
Fr act al—Makes the cellular pattern a fractal
pattern. Default=off.
The remaining three controls are active only when
Fractal is on:
Iterations—Sets the number of times the fractal
function is applied. Caution: Increasing this value
increases rendering time. Default=3.0.
Adaptive—When on, the n umber 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 also saves t ime
while rendering. Default=on.
Roughness —When you use t he Cellular map as a
bump map (page 2–1347) , this parameter controls
how rough the bumps are. When Roughness is
zero, each iteration is half the strength of the
previous iteration, and half the size. As Rough ness
increases, each iteration is closer in strength and
size to the previous iteration. When R oughness
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 a s normalized
percentages(0to1)ofthesizesspecifiedbythe
default algorithm.
Low—Adjusts t he 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 d ivisions.
Default=1.0.