constructor( color, density = 0.00025 ) {

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isFogExp2 = true;

		/**
		 * The name of the fog.
		 *
		 * @type {string}
		 */
		this.name = '';

		/**
		 * The fog's color.
		 *
		 * @type {Color}
		 */
		this.color = new Color( color );

		/**
		 *  Defines how fast the fog will grow dense.
		 *
		 * @type {number}
		 * @default 0.00025
		 */
		this.density = density;

	}
Constructs a new fog.

@param {number|Color} color - The fog's color.
@param {number} [density=0.00025] - Defines how fast the fog will grow dense.