import { FragmentShader } from '../../Shader';
export declare const cubemapPrefilterFragment: FragmentShader<{
    SHADER_NAME: string;
    SAMPLE_NUMBER: number;
    PI: number;
}, {
    viewInverse: {
        type: "mat4";
        semantic: "VIEWINVERSE";
    };
    environmentMap: {
        type: "samplerCube";
        value: import("../../TextureCube").default;
        semantic: import("../../Shader").UniformSemantic | import("../../Shader").MatrixSemantic | undefined;
    };
    normalDistribution: {
        type: "sampler2D";
        value: import("../../Texture2D").default;
        semantic: import("../../Shader").UniformSemantic | import("../../Shader").MatrixSemantic | undefined;
    };
    roughness: {
        type: "float";
        value: number;
        semantic: import("../../Shader").UniformSemantic | import("../../Shader").MatrixSemantic | undefined;
    };
}, {
    defines: {};
    uniforms: {};
    attributes: {};
    varyings: {};
    functions: ((functionName?: string) => string)[];
    main: string;
}[]>;