              type : 'lit',
                dataConfig : {
                  type : '3d-extrusion',
                  altitudeProperty : 'height',
                  minHeightProperty: 'min_height',
                  altitudeScale : 1,
                  defaultAltitude : 30,
                  top: true,
                  topThickness: 2,
                  side: true
                }
              },
              symbol: {
                material: litMaterial,
                polygonOpacity: 1,
           