Flow map

= Flow Map = A flow map stores directional information in a texture, also called a vector field. This can be used to control the UV coordinates for a water texture, to make the texture flow around rocks. It can also be used to control the direction of a hairstyle's anisotropic specular highlight. Similar map types include CurvatureMap, DuDvMap, NormalMap, RadiosityNormalMap, VectorDisplacementMap.

Flow Map Links

 * Creating "Comb" maps Polycount forum thread
 * Flow Map Painting Script Polycount forum thread
 * Creating and using Flow Maps UDK tutorial by Phill Johnson
 * How Do You Make a Flow Map? Polycount forum thread
 * UDK - Maelstrom/Whirlpool - Creation Process? Polycount forum thread

Flow Map Whitepapers

 * Water Technology of Uncharted Naughty Dog whitepaper from GDC 2012
 * Graphics Runner: Animating Water Using Flow Maps by Kyle Hayward
 * Water Flow in Portal 2 (PDF) Valve Software whitepaper from SIGGRAPH 2010