import * as THREE from 'three';
export declare enum SideBySideDirection {
    LeftRight = "LeftRight",
    TopBottom = "TopBottom"
}
export declare class MeshSideBySideAlphaMaterial extends THREE.ShaderMaterial {
    direction: SideBySideDirection;
    alphaFirst: boolean;
    map: THREE.Texture;
    constructor();
    frame(): void;
}