import Node from "../../core/Node.js";
import OperatorNode from "../../math/OperatorNode.js";

// Analytical approximation of the DFG LUT, one half of the
// split-sum approximation used in indirect specular lighting.
// via 'environmentBRDF' from "Physically Based Shading on Mobile"
// https://www.unrealengine.com/blog/physically-based-shading-on-mobile
declare const DFGApprox: (args: { roughness: Node; dotNV: Node }) => OperatorNode;

export default DFGApprox;
