dFolder( 'shadow' );
				shadowFolder.open();
				const planeFolder = gui.addFolder( 'plane' );
				planeFolder.open();


				shadowFolder.add( state.shadow, 'blur', 0, 15, 0.1 );
				shadowFolder.add( state.shadow, 'darkness', 1, 5, 0.1 ).onChange( function () {

					depthMaterial.userData.darkness.value = state.shadow.darkness;

				} );
				shadowFolder.add( state.shadow, 'opacity', 0, 1, 0.01 ).onChange( function () {

					plane.material.opacity = state.shadow.opacity;

				} );
				planeFolder.addCol