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 Filters → Render → Noise → Perlin Noise….
14.6.3. Options
图 17.340. “Perlin Noise” filter options
Presets, “Input Type”, Clipping, Blending Options, Preview, Split view
注意 | |
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These options are described in 第 2 节 “Common Features”. |
Alpha
Low values give sharper noise
图 17.341. “Alpha ” option examples
Alpha = 0.300
Alpha = 3.600
Scale
Scale of the noise function: works like a zoom.
Z offset
Vary noise.
图 17.342. “Z offset” option examples
Z offset = -1000
Z offset = 0.900
Iterations
The number of noise octaves.
Iterations = 7