diff --git a/js/kiri-driver-fdm.js b/js/kiri-driver-fdm.js
index fc7cb13c..84b6025d 100644
--- a/js/kiri-driver-fdm.js
+++ b/js/kiri-driver-fdm.js
@@ -340,6 +340,7 @@ var gs_kiri_fdm = exports;
                 if (layerout.length && minidx !== lastIndex) {
                     layerout.last().retract = true;
                 }
+                layerout.height = layerout.height || closest.slice.height;
                 slices[minidx] = null;
                 closest.offset.z = zoff;
                 // output seek to start point between mesh slices if previous data
@@ -354,7 +355,7 @@ var gs_kiri_fdm = exports;
             }
 
             layerout.layer = layer;
-            layerout.height = layer === 0 ? firstLayerHeight : process.sliceHeight;
+            // layerout.height = layerout.height || (layer === 0 ? firstLayerHeight : process.sliceHeight);
             if (layerout.length) output.append(layerout);
             layer++;
             update(layer / maxLayers);
diff --git a/js/license.js b/js/license.js
index 710f48cf..5e3d8fbb 100644
--- a/js/license.js
+++ b/js/license.js
@@ -1,7 +1,7 @@
 var exports = {
     COPYRIGHT:"Copyright (C) 2014-2017 Stewart Allen <stewart@neuron.com> - All Rights Reserved",
     LICENSE:"Unauthorized copying, modification and re-distribution are strictly prohibited without prior written consent.",
-    VERSION:"1.1.8a"
+    VERSION:"1.1.8b"
 };
 if (!module) var module = {};
 module.exports = exports;