technique

Direction field from noise

Mapping a 2D noise sample at each grid cell straight onto a full-turn angle turns a noise field into a grid of directional arrows.

Also called: noise-to-angle vector field · flow field grid visualization

What it is

Covered here rather than as pages of their own — each is described by a single source, and gets promoted the moment a second one corroborates it.

Vary the spatial scale at which Perlin noise is sampled to move a flow field between tight scribbles and long, sweeping lines.

Steps: the scale of the Perlin noise

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