14.6. Perlin Noise

14.6.1. Overview

This filter generates a noise texture using the Perlin Noise algorithm. Results don't depend on the image you opened.

Filter applied with default options: Alpha=1.200 Scale=1.800 Z offset=-1.000 Iterations=3

14.6.2. Activating the filter

This filter is found in the image window menu under FiltersRenderNoisePerlin Noise….

14.6.3. Options

Figure 17.328. Perlin Noise filter options

Perlin Noise filter options

Presets, Preview, Split view, Use selection as input
[Note] Note

These options are described in Section 2, “Common Features”.

Alpha

Low values give sharper noise

Figure 17.329. Alpha option examples

Alpha option examples

Alpha = 0.300

Alpha option examples

Alpha = 3.600


Scale

Scale of the noise function: works like a zoom.

Z offset

Vary noise.

Figure 17.330. Z offset option examples

Z offset option examples

Z offset = -1000

Z offset option examples

Z offset = 0.900


Iterations

The number of noise octaves.

Iterations = 7