ZBrush Character Creation - Advanced Digital Sculpting 2nd Edition

■ ZBrush to Photoshop 281

5. The next render will serve as an Ambient Occlusion pass. Ambient Occlusion
   renders are used to accentuate shadows, and most major rendering packages
   have the capacity to create an Ambient Occlusion render. We will use ZBrush’s
   Ambient Occlusion rendering tool to create this pass. Switch to the Flat Color
   material. Under Rendering, turn off Shadows and turn on AOcclusion. Click the
   BPR button at the top of the menu to create this particular render (Figure 8.27).
   The BPR button stands for Best Preview Render. The BPR rendering engine is
   new to ZBrush 4.0. It has the benefit of real-world shadows, fur, and subsurface
   scattering algorithms built in. Save the resulting render as occ.psd.


6. We also want to create a cavity pass to help darken the shading in the fine
   details. A cavity pass will render white for the high areas and dark into the
   pores and wrinkles. Make sure you are at the highest subdivision level and open
   the Masking menu.


7. We will create the cavity mask from the highest subdivision level to capture the
   fine details of the sculpture. Click the Cavity Profile curve to open it. Add points
   to the curve and change its shape to the one shown in Figure 8.28. Set Cavity
   Intensity to 100 and click the Mask By Cavity button.

Figure 8.25 Fill with

a material by clicking

the FillObject button.

Figure 8.26 The character head with the Flat Color mate-
rial. All shading information is removed and only the
painted color remains.

Figure 8.27 This Ambient Occlusion pass was created

using the BPR mode under the Rendering menu.