Page 366 - Enhancing CAD Drawings with Photoshop

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Extracting images of real people from photographs is a great way to add interest to your plans and projects.
LEFT: This ordinary digital photo was taken against a solid background. MIDDLE: Extracted as entourage,
the woman can be inserted into any elevation, compositing project, or 3D scene. RIGHT: The alpha channel
was generated from transparency using the Calculations tool after extraction and is used in Autodesk VIZ as
an opacity map (see Chapter 4).