/** Seeded 3D simplex noise field with fractal `fbm` and `ridged` sums. */
export interface Noise3D {
    /** Single octave, output roughly in [-1, 1]. */
    sample(x: number, y: number, z: number): number;
    /** Fractal Brownian motion, output roughly in [-1, 1]. */
    fbm(x: number, y: number, z: number, octaves?: number, lacunarity?: number, gain?: number): number;
    /** Ridged multifractal, output in [0, 1] — sharp crests, good for mountains. */
    ridged(x: number, y: number, z: number, octaves?: number, lacunarity?: number, gain?: number): number;
}
/**
 * Seeded 3D simplex noise (classic Gustavson, seed-shuffled permutation
 * table): the field is fully deterministic per seed. Powers procedural-body
 * displacement and CPU terrain.
 *
 * @param seed - Any integer; same seed → same field.
 * @returns A {@link Noise3D} with `sample`, `fbm`, and `ridged`.
 */
export declare function createNoise3D(seed?: number): Noise3D;
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