Page 538 - Kitab3DsMax

Part IV: Materials, Cameras, and Lighting Basics

Mask map
In the Mask Parameters rollout, you can select one map to use as a Mask and another one to display
through the holes in the mask simply called Map. You also have an option to Invert the Mask. The black
areas of the masking map are the areas that hide the underlying map. The white areas allow the underlying
map to show through. The result of the Mask map is visible only when rendered.

Mix map
You can use the Mix map to combine two maps or colors. It is similar to the Composite map, except that it
uses a Mix Amount value to combine the two colors or maps instead of using the alpha channel. In the Mix
Parameters rollout, the Mix Amount value of 0 includes only Color #1, and a value of 100 includes only
Color #2. You can also use a Mixing Curve to define how the colors are mixed. The curve shape is con-
trolled by altering its Upper and Lower values.
Figure 17.30 shows the Mix map with Perlin Marble and Checker maps applied as sub-maps and Mix val-
ues of (from left to right) 25, 50, and 75.

FIGURE 17.30
The Mix map lets you combine two maps and define the Mix Amount.

RGB Multiply map
The RGB Multiply map multiplies the RGB values for two separate maps and combines them to create a sin-
gle map. Did you notice in the preceding figure that the Mix map fades both maps? The RGB Multiply map
keeps the saturation of the individual maps by using each map’s alpha channel to combine the maps.
The RGB Multiply Parameters rollout includes an option to use the Alpha from either Map #1 or Map #2 or
to Multiply the Alphas.
Figure 17.31 shows three samples of the RGB Multiply map. Each of these images combines a Wood map
with (from left to right) a Checker map, a Gradient map, and a Stucco map. Notice that the colors aren’t
faded for this map type.
Color Modifier maps
You can use this group of maps to change the color of different materials. Color Modifier map types include
Output, RGB Tint, and Vertex Color.

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