Alphas
Alphas in ZBrush are grayscale images that serve three major functions: they can be brush shapes, texture stamps, and stencils. You load, export, and manipulate alphas via the Alpha menu located at the top menu bar. There is also an Alpha palette on the side tray on the left (Figure 4-4). This is an abbreviated Alpha menu since it offers only a few menu options, but it provides easy access to the entire alpha library currently loaded. Combined with various stroke settings, alphas offer a powerful tool for adding high-frequency details to your sculpture.
Figure 4-4: The Alpha palette from the left tray
You can also use alphas to generate ...
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