Fractal Sum

Generators / Noises

Multi-octave fractal noise over a selectable basis, with fbm, turbulence, ridged, and hybrid-multifractal combination modes. A no-clip tone map keeps every mode gradeable without clipping. Band-limited for resolution invariance and seamless under any lacunarity.

Select a node to adjust its parameters. Double-click a node to inspect.

Parameters

Parameter	Type	Default	Range	Description
`basis` Basis	enum	perlin		The noise function summed across octaves. `perlin` : Gradient lattice noise. The smooth, familiar default. `simplex` : Gradient noise on a triangular lattice. Less axis-aligned bias than Perlin.
`mode` Mode	enum	fbm		How octaves are combined. `fbm` : Fractal Brownian motion. Plain sum of octaves, soft and cloudy. `turbulence` : Sum of absolute values. Dark creases at every zero crossing, billowy smoke. `ridged` : Sharp ridge lines that carry detail over smooth valleys. Ridged multifractal. `hybrid_multifractal` : Musgrave hybrid multifractal: flat lowlands with rugged, detailed highlands. The classic terrain multifractal.
`scale` Scale	int	4	1 to 64	Number of cells across the texture in the base octave. Higher = smaller base features.
`octaves` Octaves	float	3	1 to 6	Number of noise layers. Fractional values fade the finest octave in smoothly. The slider stops at 6, but you can type a higher value (up to 12) for extra fine detail at high resolution. Octaves beyond the resolution limit fade out automatically.
`roughness` Roughness	float	0.5	0 to 1	Amplitude falloff per octave. Higher keeps more fine detail; lower emphasizes the base octaves.
`disorder` Disorder	float	0	0 to 1	Morphs the pattern per octave for variation or looping animation. Values 0 and 1 match for a seamless loop.
`disorder_speed` Disorder Speed	float	1	0 to 4	Multiplier on the per-octave disorder morph.
`offset` Offset	vec2	[0, 0]	-1 to 1	Pans across the infinite noise plane. Different positions produce different tileable patterns.
`seed` Seed	float	0	0 to 100	Random seed for noise variation.

Outputs

output (default format: r32float)