Stefan Röttger

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The main application areas of deferred shading is

• Tile-based rendering on low-end platforms.
  • PowerVR mobile platform
• Hi-end shading algorithms in computer game engies.
  • Crytek Engine

The technique of deferred shading separates the task of shading into a first rendering pass where the fragment attributes are gathered in multiple rendering buffers and a second rendering pass, where the final fragment color is computed from the precomputed attribute values in the buffers.

First rendering passes for computing color-, normal- and z-values:

wikipedia

Final rendering pass showing the composited image:

wikipedia

The main advantage is that costly shading operations are dferred into the final pass where they are only executed once per fragment.

For more reading see wikipedia.

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