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

图 17.328. Perlin Noise filter options

Perlin Noise filter options

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

These options are described in 第 2 节 “Common Features”.

Alpha

Low values give sharper noise

图 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.

图 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