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### Camera Ray Perturbation

The optional `normal` may be used to assign a normal pattern to the camera. For example:

     camera{

       location Here

       look_at There

       normal{bumps 0.5}

     }

All camera rays will be perturbed using this pattern. The image will be distorted as though you were looking through bumpy glass or seeing a reflection off of a bumpy surface. This lets you create special effects. See the animated scene `camera2.pov` for an example. See "Normal" for information on normal patterns.

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