export type FractalPaletteId = 'classic' | 'ember' | 'porcelain' | 'spectral';
export type FractalRgb = readonly [number, number, number];
export interface FractalPaletteDefinition {
    readonly label: string;
    readonly surfaceLow: FractalRgb;
    readonly surfaceHigh: FractalRgb;
    readonly highlight: FractalRgb;
    readonly rim: FractalRgb;
    readonly productFirst: FractalRgb;
    readonly productSecond: FractalRgb;
    readonly productRim: FractalRgb;
    readonly seam: FractalRgb;
}
/**
 * Shared field palettes. `classic` reproduces the original quaternion and
 * bicomplex ray-march colors; the other entries change presentation only.
 */
export declare const FRACTAL_PALETTES: Readonly<Record<FractalPaletteId, FractalPaletteDefinition>>;
export declare function getFractalPalette(id: FractalPaletteId): FractalPaletteDefinition;
/** Three-stop CPU sampler used by relief and diagnostic mesh products. */
export declare function sampleFractalPalette(id: FractalPaletteId, value: number): number;
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