update.js

    shouldComponentUpdate( nextProps ) {

        const { group, } = this.refs;

        if( group ) {
            if( nextProps.position ) {
                group.position.copy( nextProps.position );
            }
            if( nextProps.rotation ) {
                group.rotation.copy( nextProps.rotation );
            }
            if( nextProps.quaternion ) {
                group.quaternion.copy( nextProps.quaternion );
            }
            if( nextProps.scale ) {
                group.scale.copy( nextProps.scale );
            }
            if( nextProps.materialIds !== this.props.materialIds ) {
                this._updateMaterials( nextProps.materialIds );
            }
        }

        return false;

    }