/** A declarative source for image-based scene lighting. */
export type EnvironmentSource = 
/** Procedural two-color sky probe, preserving the engine default. */
{
    kind: "gradient";
    sky: string;
    ground: string;
    sun?: string;
    intensity?: number;
}
/** Equirectangular HDR or EXR environment map loaded from `url`. */
 | {
    kind: "hdri";
    url: string;
    rotation?: number;
    intensity?: number;
}
/** Six faces of a cube environment map, in three.js cube-loader order. */
 | {
    kind: "cube";
    urls: [string, string, string, string, string, string];
    intensity?: number;
};