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Perlin Noise

Classic Perlin. Smoothly varying pseudo-random values, good for soft bumps and gentle organic detail. Output sits roughly between -1 and 1, so remap before treating it as a mask.

Perlin Noise node

The Perlin Noise node

When to use it

Classic Perlin. Smoothly varying pseudo-random values, good for soft bumps and gentle organic detail. Output sits roughly between -1 and 1, so remap before treating it as a mask.

One octave only. For the layered detail that actually reads as terrain, Perlin FBM.

Perlin has mild axis-aligned artefacts, faint grid lines you notice once you know they are there. Simplex is the better default for that reason.

Pins

Pin Type Description
Frequency Number How tight the pattern is. Higher numbers give you finer, busier detail.
OffsetX Number Slide the pattern along X.
OffsetY Number Slide the pattern along Y.
OffsetZ Number Slide the pattern along Z.
Seed Whole Number Change this for a different pattern at the same settings. The same seed always gives you the same noise.
Pin Type Description
Result Number The noise here. Roughly -1 to 1.