14.6. Perlin Noise

14.6. Perlin Noise
	14. 渲染滤镜

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….

图 17.340. “Perlin Noise” filter options

Presets, “Input Type”, Clipping, Blending Options, Preview, Split view

	注意
	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