diff --git a/example/save.js b/example/save.js
index 0003df2..3339d17 100644
--- a/example/save.js
+++ b/example/save.js
@@ -10,13 +10,12 @@ const settings = new Settings({
 const jsonLoader = new THREE.JSONLoader();
 jsonLoader.load('models/airplane.json', async geometry => {
   geometry.applyMatrix(new THREE.Matrix4().makeRotationX(Math.PI / -2));
-  geometry.applyMatrix(new THREE.Matrix4().setPosition(new THREE.Vector3(50, -0.1, 50)));
-  geometry.mergeVertices();
+  geometry.applyMatrix(new THREE.Matrix4().setPosition(new THREE.Vector3(50, 0.1, 50)));
   geometry.computeFaceNormals();
 
   const slicer = new Slicer().setGeometry(geometry);
-  const gcode = await slicer.slice(settings);
+  const gcode = slicer.sliceSync(settings);
 
-  const file = new File([gcode], 'traktor.gcode', { type: 'text/plain' });
+  const file = new File([gcode], 'gcode.gcode', { type: 'text/plain' });
   saveAs(file);
 });
diff --git a/src/sliceActions/detectOpenClosed.js b/src/sliceActions/detectOpenClosed.js
index 228280e..443e103 100644
--- a/src/sliceActions/detectOpenClosed.js
+++ b/src/sliceActions/detectOpenClosed.js
@@ -7,12 +7,12 @@ export default function detectOpenClosed(lines) {
   for (let i = 0; i < pools.length; i ++) {
     const pool = pools[i];
 
-    const isOpen = pool.some(lineIndex => openLines[lineIndex]);
+    const isOpenGeometry = pool.some(lineIndex => openLines[lineIndex]);
 
     for (let j = 0; j < pool.length; j ++) {
       const lineIndex = pool[j];
       const line = lines[lineIndex];
-      line.open = isOpen;
+      line.openGeometry = isOpenGeometry;
     }
   }
 }
diff --git a/src/sliceActions/intersectionsToShapes.js b/src/sliceActions/intersectionsToShapes.js
index 52db98b..fbd4903 100644
--- a/src/sliceActions/intersectionsToShapes.js
+++ b/src/sliceActions/intersectionsToShapes.js
@@ -22,7 +22,7 @@ export default function intersectionsToShapes(layerIntersectionIndexes, layerInt
       const shape = [];
 
       const firstPoints = [index];
-      const { open: openGeometry } = lines[index];
+      const { openGeometry } = lines[index];
       let isFirstPoint = true;
       let openShape = true;