Persistence of Vision
Reference Format
----------------------
  
  Please document any new features in the following format.


KEYWORD: KEYWORD

BRIEFLY:
 One or two lines briefly describing feature.
SYNTAX:
 Describe the syntax of the feature.

DESCRIPTION:
 Full description of feature and how it is used.

EXAMPLE:
 Short example of how to use the feature.


---Example---


KEYWORD: MARBLE

BRIEFLY:
 This texture applies a marble coloring to an object's surface.
SYNTAX:
 MARBLE (TURBULENCE 0.0) (COLOR_MAP map)

DESCRIPTION: 
  MARBLE creates veins of color on an object's surface that give it the
appearance of marble stone. TURBULENCE values from 0.0 - 1.0 can be used 
to make the veins swirl together more. Higher values give more turbulence.
The default MARBLE color map is red and white, but a COLOR_MAP can be 
specified to simulate different types of marble. 
MARBLE is used inside a TEXTURE/END_TEXTURE block.                                             

EXAMPLE:
 TEXTURE
  MARBLE
   TURBULENCE 0.3
   COLOR_MAP
   [0.0 0.5 COLOR White
            COLOR Blue]
   [0.5 1.0 COLOR Blue
            COLOR White]
 END_TEXTURE