dispose() {

		/**
		 * Fires when the material has been disposed of.
		 *
		 * @event Material#dispose
		 * @type {Object}
		 */
		this.dispatchEvent( { type: 'dispose' } );

	}
Frees the GPU-related resources allocated by this instance. Call this
method whenever this instance is no longer used in your app.

@fires Material#dispose