The colors for the gradient are set by Color #1, Color #2, and Color #3. You can also map
these colors. The Color 2 Position parameter sets the relative location of the middle color to
the upper and lower colors??”i.e., 0.5 is the middle because the other colors are at 0 and 1.0.
Gradient Ramp
Similar to the Gradient map, but much more powerful, the Gradient Ramp is a procedural
map that allows you to grade from and to any number of grayscale shades. Gradient Ramps
are perfect for creating maps that fall off (for example, for opacity effects where the opacity
fades away). See Figure 7.54.
Use the sliders along the ramp in the Material Editor to set the position of the gray
value. Click in the ramp to create a new slider at that grayscale value. The Black and White
sliders at the very ends do not move. To delete a slider, right-click on it, and choose Delete
from the context menu that appears. Notice the value and position readout above the ramp.
3D Maps
Similar to 2D maps that are generated in two dimensions, 3D maps are patterns generated
procedurally in all three dimensions. For example, Marble has a grain that goes through
the assigned geometry in X, Y, and Z. If you cut away part of an object with Marble assigned
as its texture, the grain in the cutaway portion matches the grain on the object??™s exterior.
Pages:
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418