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Blender 2.5 Lighting and Rendering by Aaron W. Powell

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Advantages and disadvantages

Both of these algorithms approach ambient occlusion from different angles, each with their own advantages and disadvantages. Let's take another look at these differences.

Raytraced ambient occlusion

The advantages of raytraced ambient occlusion are as follows:

  • Realistic/physically accurate results
  • Great for still images

The disadvantages are:

  • Images contain some degree of noise
  • Flickering occurs between frames in animation
  • Longer render times
  • More stress on the computer's CPU

Approximated ambient occlusion

The advantages of approximated ambient occlusion are:

  • Faster render times
  • Less computing power needed
  • Noise-free
  • Good for both still images and animation

The disadvantages are:

  • When faces behind one another are facing the same ...

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