Working with alphas


show more Working with alphas provides you with in-depth training on 3D + Animation. Taught by Ryan Kittleson as part of the ZBrush 4 Essential Training show less
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Working with alphas

First of all, let's talk about what an alpha is. Alphas are used in all kinds of computer graphics software and it's simply a grayscale image, a picture that uses a range of values from black to white. What makes a grayscale image an alpha instead of just an ordinary picture is how it's used. Different softwares can interpret these light and dark values as data rather than as simply a picture. An alpha could be used to define what parts of an image should be transparent; white could be opaque and black could be see-through and every shade of gray could be varying levels of opacity. Or an alpha could be used to define what parts of a model should be shiny and which ones should be dull.

As far as ZBrush goes, alphas are used to define what parts of a brushstroke should get the full effect and which parts should remain unaffected. So let's just test this out. I am going to open up the DemoRhino, and let's change its color to something lighter so it's easier to see. I a...

Working with alphas
Video duration: 2m 34s 2h 58m Beginner Updated May 07, 2015

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Working with alphas provides you with in-depth training on 3D + Animation. Taught by Ryan Kittleson as part of the ZBrush 4 Essential Training

Subject:
3D + Animation
Software:
ZBrush
Author:
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