Page 247 - Enhancing CAD Drawings with Photoshop

4386.book Page 231 Monday, November 15, 2004 3:27 PM
RENDERING IN AUTODESK VIZ 231

Figure 7.12
The Selection Floater
dialog box

3. Press M to reopen the Material Editor dialog box, as shown in Figure 7.13. Scroll to an unused
sample slot by clicking the Down arrow on the vertical scrollbar. To change the material type,
click the button that is currently marked Standard.
Figure 7.13
Changing material
types in the Material
Editor dialog box

4. The Material/Map Browser dialog box appears (see Figure 7.14). Choose Matte/Shadow from
the list of materials and click OK.
5. The Matte/Shadow material and its parameters appear in the Material Editor dialog box.
Uncheck Opaque Alpha in the Matte group. When this setting is unchecked, the matted objects
will not contribute to the alpha channel, so the rendering can be used for compositing. In the
Shadow group, uncheck Receive Shadows and uncheck Affect Alpha; we will deal with shad-
ows differently later in this tutorial.