Graphics Reference
In-Depth Information
Figure 3-14:
The triangle Grid
Noise
The Noise texture behaves similarly to the Photoshop Clouds filter. This is a fractal pattern, which varies
between two colors and two alpha values. The default type of noise is a fractal noise. This uses a mathemat-
ical algorithm to create the variation between the two colors. This can be set to varying levels of complexity
with the Frequencies option. Setting Frequencies to 1 will result in a simple and smooth fractal pattern. Set-
ting it to a higher value will increase the subtle variances in color. The Simple type of noise is essentially
equal to the Fractal type set to a single frequency. The third type of Noise is Turbulence. Turbulence behaves
more like the Difference Clouds filter in Photoshop. This final version has stronger peaks and is generally
brighter in appearance than the other two types. Both the Fractal and the Turbulence types allow for control
over the number of frequencies as well as the Frequency and Amplitude ratios. Smooth Tops gives control
over the visibility of the underlying frequencies. These three settings behave nearly identically to the set-
