ZBrush

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Pixologic ZBrush

Screenshot of ZBrush 3.0
Developer Pixologic
Latest release 3.1 / August 2007
OS Windows, Mac OS X
Genre 3D computer graphics
License Proprietary
Website Pixologic ZBrush site

ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology (see below) which stores lighting, color, material, and depth information for all objects on the screen. The main difference between ZBrush and more traditional modeling packages is that it is more akin to sculpting.

ZBrush is used as a digital sculpting tool to create high-resolution models (up to millions of polygons, and theoretically unlimited) for use in movies, games, and animations. It is used by companies ranging from ILM to Electronic Arts. ZBrush uses dynamic levels of resolution to allow sculptors to make global or local changes to their models. ZBrush is most known for being able to sculpt medium to high frequency details that were traditionally painted in bump maps. The resulting mesh details can then be exported as normal maps to be used on a low poly version of that same model. Or, once completed, the 3D model can be projected to the background, becoming a 2.5D image (upon which further effects can be applied). Work can begin then on another 3D model which can be used in the same scene. This feature lets users work with extremely complicated scenes without heavy processor overhead.

Like a pixel, each pixol contains information on X and Y position and color values. Unlike pixels, it also contains information on depth (or Z position), orientation and material. Only ZBrush related files can store pixol information, and exported files (to JPEG or PNG, for example) will not have pixol data, as those have been rendered into 2D.

This technique is similar in concept to a voxel, another kind of 3D pixel.

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