containsNode( builder ) {

		const material = builder.material;

		for ( const property in material ) {

			if ( material[ property ] && material[ property ].isNode )
				return true;

		}

		if ( builder.renderer.overrideNodes.modelViewMatrix !== null || builder.renderer.overrideNodes.modelNormalViewMatrix !== null )
			return true;

		return false;

	}
Returns `true` if the node builder's material uses
node properties.

@param {NodeBuilder} builder - The current node builder.
@return {boolean} Whether the node builder's material uses node properties or not.