“Fractal” is a parametric texture.
The Fractal texture is a surface texture based on U, V parameter values and is a random function that has a particular frequency distribution.
Fractals can be used for many different effects. A patch that is displacement mapped with a fractal will resemble a piece of rock or a mountain. A surface transparency mapped with a fractal will look like a piece of cloud or flame. Fractals are often used as part of more complex textures to create special effects such as marble and wood.
| Argument Name | Absolute Range | Useful Range | Default | Description |
| animated | TRUE FALSE | FALSE | Flag to use 3D texture with u, v, time rather than 2D texture with just u, v | |
| level_min | 0, infinity | 0, 20 | 0.0 | Minimum level of iteration |
| level_max | 0, infinity | 0, 20 | 9.0 | Maximum level of iteration allowed |
| *time | 0, infinity | 0, 1 | 0.0 | Time dimension for animated texture, wraps for range 0, 1 |
| ratio | 0, 1.0 | 0, 1 | 0.707 | Fractal ratio |
| amplitude | 0, infinity | 0, 1 | 1.0 | Amplitude of fractal |
| threshold | 0, 1 | 0, 1 | 0.0 | Threshold for fractal |
| urepeat | -infinity, infinity | -10.0, 10.0 | 1.0 | # of copies in u direction within coverage area. |
| vrepeat | -infinity, infinity | -10.0, 10.0 | 1.0 | # of copies in v direction within coverage area. |
| uoffset | -infinity, infinity | -1.0, 1.0 | 0.0 | U offset repeat within coverage area |
| voffset | -infinity, infinity | -1.0, 1.0 | 0.0 | V offset repeat within coverage area |
| ucoverage | -infinity, infinity | 0.0, 1.0 | 1.0 | amount of U surface to be textured |
| vcoverage | -infinity, infinity | 0.0, 1.0 | 1.0 | amount of V surface to be textured |
| utranslate | -infinity, infinity | -1.0, 1.0 | 0.0 | amount of U coverage area to be moved. |
| vtranslate | -infinity, infinity | -1.0, 1.0 | 0.0 | amount of V coverage area to be moved. |
| uwrap | TRUE FALSE | TRUE | flag to wrap texture around U boundaries of coverage area. | |
| vwrap | TRUE FALSE | TRUE | flag to wrap texture around U boundaries of coverage area. | |
| worldspace | TRUE FALSE | FALSE | flag to use world space texture mapping | |
| rotate | -infinity, infinity | -360.0, 360.0 | 0.0 | angle coverage area to be rotated |
| mirror | TRUE FALSE | FALSE | flag to match edges of texture |
*The fractal will cycle as a function of time with period 1.
