Spatial Noise

The Spatial Noise modifier adds some spatial noise to the stroke. Spatial noise displacements are added in the normal direction (i.e. the direction perpendicular to the tangent line) evaluated at each stroke vertex.

Amplitude
How much the noise distorts the stroke.
Scale
How wide the noise is along the stroke.
Octaves
The level of detail of the noise.
Smooth
When enabled, apply some smoothing over the generated noise.
Pure Random
When disabled, the next generated random value depends on the previous one; otherwise they are completely independent. Disabling this setting gives a more «consistent» noise along a stroke.