POV-Ray : Documentation : 2.3.1.4 Camera Ray Perturbation
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2.3.1.3 Focal Blur   2.3.1.5 Camera Identifiers

2.3.1.4 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.

More about "normal"

2.3.1.3 Focal Blur   2.3.1.5 Camera Identifiers


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