Variable customBumpMapGLTFExtension`Const`

customBumpMapGLTFExtension: {
    export: (
        w: GLTFWriter2,
    ) => { writeMaterial: (material: any, materialDef: any) => void };
    import: (
        p: GLTFParser,
        v: undefined | ThreeViewer,
    ) => GLTFMaterialsCustomBumpMapImport;
    name: string;
    textures: { customBumpMap: string };
} = ...