14.6. Perlin Noise

14.6. Perlin Noise
	14. Rendering Filters

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

This filter is found in the image window menu under Filters → Render → Noise → Perlin Noise….

Figure 17.335. “Perlin Noise” filter options

Presets, Preview, Split view, Use selection as input

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

Alpha

Low values give sharper noise

Figure 17.336. “Alpha ” option examples

Alpha = 0.300

Alpha = 3.600

Scale

Scale of the noise function: works like a zoom.

Z offset

Vary noise.

Figure 17.337. “Z offset” option examples

Z offset = -1000

Z offset = 0.900

Iterations

The number of noise octaves.

Iterations = 7