three.js/src/scenes/FogExp2.d.ts

import { Color } from './../math/Color';
import { IFog } from './Fog';
/**
 * This class contains the parameters that define linear fog, i.e., that grows exponentially denser with the distance.
 */
export class FogExp2 implements IFog {
  constructor(hex: number | string, density?: number);

  name: string;
  color: Color;

  /**
   * Defines how fast the fog will grow dense.
   * Default is 0.00025.
   */
  density: number;

  clone(): this;
  toJSON(): any;
}