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"

• 2.5.2 Normal in 2.5 Textures
• 2.8.10.5 Normal in 2.8.10 Texture
• 1.3.4.2 Normals in 1.3.4 Advanced Texture Options