import { RGBAColor } from "../engine/js-extensions/index.js";
import { Behaviour } from "./Component.js";
/**
 * The mode of the ShadowCatcher.
 * - ShadowMask: only renders shadows.
 * - Additive: renders shadows additively.
 * - Occluder: occludes light.
 */
declare enum ShadowMode {
    ShadowMask = 0,
    Additive = 1,
    Occluder = 2
}
/**
 * ShadowCatcher can be added to an Object3D to make it render shadows (or light) in the scene. It can also be used to create a shadow mask, or to occlude light.
 * If the GameObject is a Mesh, it will apply a shadow-catching material to it - otherwise it will create a quad with the shadow-catching material.
 *
 * Note that ShadowCatcher meshes are not raycastable by default; if you want them to be raycastable, change the layers in `onEnable()`.
 * @category Rendering
 * @group Components
 */
export declare class ShadowCatcher extends Behaviour {
    mode: ShadowMode;
    shadowColor: RGBAColor;
    private targetMesh?;
    /** @internal */
    start(): void;
    applyLightBlendMaterial(): void;
    applyShadowMaterial(): void;
    applyOccluderMaterial(): void;
    private applyMaterialOptions;
}
export {};