diff --git a/simpleExample/index.js b/simpleExample/index.js
index 282237a..43f9cd1 100644
--- a/simpleExample/index.js
+++ b/simpleExample/index.js
@@ -9,6 +9,7 @@ const settings = {
 };
 
 const geometry = new THREE.TorusGeometry(20, 10, 30, 30).clone();
+geometry.mergeVertices();
 
 const onProgress = ({ progress: { done, total, action } }) => {
   const percentage = `${(done / total * 100).toFixed()}%`
@@ -17,4 +18,4 @@ const onProgress = ({ progress: { done, total, action } }) => {
 
 sliceGeometry(settings, geometry, null, false, onProgress).then(gcode => {
   document.body.innerHTML = gcode.replace(/(?:\r\n|\r|\n)/g, '<br />');
-});
\ No newline at end of file
+});
diff --git a/src/settings/default.yml b/src/settings/default.yml
index 0fd05a0..128a25c 100644
--- a/src/settings/default.yml
+++ b/src/settings/default.yml
@@ -2,49 +2,49 @@ dimensions:
   x: 200
   y: 200
   z: 200
-temperature: 210
-bedTemperature: 70
-# heatBedTemperature: 20
-# heatTemperature: 20
-# heatupEnabled: true
-travelSpeed: 200.0
-layerHeight: 0.15
 heatedBed: false
 nozzleDiameter: 0.4
 filamentThickness: 2.85
+temperature: 210
+bedTemperature: 70
+layerHeight: 0.15
+thickness:
+  top: 1.2
+  bottom: 1.2
+  shell: 0.8
 retraction:
-  amount: 3.0
   enabled: true
+  amount: 3.0
   speed: 50.0
   minDistance: 0.0
+travel:
+  speed: 200.0
 support:
+  enabled: false
   acceptanceMargin: 1.5
   distanceY: 0.4
-  enabled: false
   gridSize: 6.0
   margin: 2.0
   plateSize: 4.0
   flowRate: 0.8
   speed: 40.0
-outerLine:
+innerShell:
+  flowRate: 1.0
+  speed: 50.0
+outerShell:
   flowRate: 1.0
   speed: 40.0
-innerLine:
+innerInfill:
   flowRate: 1.0
-  speed: 50.0
-fill:
-  flowRate: 1.0
-  speed: 50.0
+  speed: 80.0
   gridSize: 5.0
+outerInfill:
+  flowRate: 1.0
+  speed: 50.0
 brim:
+  offset: 4.0
   flowRate: 1.0
   speed: 40.0
-  offset: 4.0
-top:
-  thickness: 1.2
-bottom:
+firstLayer:
   flowRate: 1.2
   speed: 40.0
-  thickness: 0.4
-shell:
-  thickness: 0.4
diff --git a/src/sliceActions/applyPrecision.js b/src/sliceActions/applyPrecision.js
index 8fa3187..d7f8089 100644
--- a/src/sliceActions/applyPrecision.js
+++ b/src/sliceActions/applyPrecision.js
@@ -2,10 +2,11 @@ import { PRECISION } from '../constants.js'
 
 export default function applyPrecision(shapes) {
   for (let i = 0; i < shapes.length; i ++) {
-    const { closedShapes, openShapes } = shapes[i];
+    const { fillShapes, lineShapesOpen, lineShapesClosed } = shapes[i];
 
-    scaleUpShape(closedShapes);
-    scaleUpShape(openShapes);
+    scaleUpShape(fillShapes);
+    scaleUpShape(lineShapesOpen);
+    scaleUpShape(lineShapesClosed);
   }
 }
 
diff --git a/src/sliceActions/generateInfills.js b/src/sliceActions/generateInfills.js
index 0d0ca29..3ddfa56 100644
--- a/src/sliceActions/generateInfills.js
+++ b/src/sliceActions/generateInfills.js
@@ -5,19 +5,21 @@ import Shape from 'clipper-js';
 export default function generateInfills(slices, settings) {
   let {
     layerHeight,
-    fill: { gridSize: fillGridSize },
-    bottom: { thickness: bottomThickness },
-    top: { thickness: topThickness },
+    innerInfill: { gridSize: infillGridSize },
+    thickness: {
+      top: topThickness,
+      bottom: bottomThickness
+    },
     nozzleDiameter
   } = settings;
 
-  fillGridSize /= PRECISION;
+  infillGridSize /= PRECISION;
   nozzleDiameter /= PRECISION;
 
   const bottomSkinCount = Math.ceil(bottomThickness/layerHeight);
   const topSkinCount = Math.ceil(topThickness/layerHeight);
   const nozzleRadius = nozzleDiameter / 2;
-  const hightemplateSize = Math.sqrt(2 * Math.pow(nozzleDiameter, 2));
+  const outerFillTemplateSize = Math.sqrt(2 * Math.pow(nozzleDiameter, 2));
 
   for (let layer = 0; layer < slices.length; layer ++) {
     const slice = slices[layer];
@@ -32,39 +34,35 @@ export default function generateInfills(slices, settings) {
     for (let i = 0; i < slice.parts.length; i ++) {
       const part = slice.parts[i];
 
-      if (!part.shape.closed) {
-        continue;
+      if (!part.closed) continue;
+
+      const innerShell = part.shell[part.shell.length - 1];
+
+      if (innerShell.paths.length === 0) continue;
+
+      const fillArea = innerShell.offset(-nozzleRadius);
+      let innerFillArea;
+      let outerFillArea;
+      if (surroundingLayer) {
+        outerFillArea = fillArea.difference(surroundingLayer).intersect(fillArea);
+        innerFillArea = fillArea.difference(outerFillArea);
+      } else {
+        outerFillArea = fillArea;
       }
 
-      const outerLine = part.outerLine;
+      if (innerFillArea && innerFillArea.paths.length > 0) {
+        const bounds = innerFillArea.shapeBounds();
+        const innerFillTemplate = getFillTemplate(bounds, infillGridSize, true, true);
 
-      if (outerLine.paths.length > 0) {
-        const inset = (part.innerLines.length > 0) ? part.innerLines[part.innerLines.length - 1] : outerLine;
+        part.innerFill.join(innerFillTemplate.intersect(innerFillArea));
+      }
 
-        const fillArea = inset.offset(-nozzleRadius);
-        let lowFillArea;
-        let highFillArea;
-        if (surroundingLayer) {
-          highFillArea = fillArea.difference(surroundingLayer).intersect(fillArea);
-          lowFillArea = fillArea.difference(highFillArea);
-        } else {
-          highFillArea = fillArea;
-        }
+      if (outerFillArea.paths.length > 0) {
+        const bounds = outerFillArea.shapeBounds();
+        const even = (layer % 2 === 0);
+        const outerFillTemplate = getFillTemplate(bounds, outerFillTemplateSize, even, !even);
 
-        if (lowFillArea && lowFillArea.paths.length > 0) {
-          const bounds = lowFillArea.shapeBounds();
-          const lowFillTemplate = getFillTemplate(bounds, fillGridSize, true, true);
-
-          part.fill.join(lowFillTemplate.intersect(lowFillArea));
-        }
-
-        if (highFillArea.paths.length > 0) {
-          const bounds = highFillArea.shapeBounds();
-          const even = (layer % 2 === 0);
-          const highFillTemplate = getFillTemplate(bounds, hightemplateSize, even, !even);
-
-          part.fill.join(highFillTemplate.intersect(highFillArea));
-        }
+        part.outerFill.join(outerFillTemplate.intersect(outerFillArea));
       }
     }
   }
diff --git a/src/sliceActions/generateInnerLines.js b/src/sliceActions/generateInnerLines.js
index cfab81e..0c97a5d 100644
--- a/src/sliceActions/generateInnerLines.js
+++ b/src/sliceActions/generateInnerLines.js
@@ -12,12 +12,14 @@ export default function generateInnerLines(slices, settings) {
   let {
     layerHeight,
     nozzleDiameter,
-    shell: { thickness: shellThickness }
+    thickness: { shell: shellThickness }
   } = settings;
+
   nozzleDiameter /= PRECISION;
   shellThickness /= PRECISION;
+
   const nozzleRadius = nozzleDiameter / 2;
-  const shells = Math.round(shellThickness / nozzleDiameter);
+  const numShells = Math.round(shellThickness / nozzleDiameter);
 
   for (let layer = 0; layer < slices.length; layer ++) {
     const slice = slices[layer];
@@ -25,21 +27,21 @@ export default function generateInnerLines(slices, settings) {
     for (let i = 0; i < slice.parts.length; i ++) {
       const part = slice.parts[i];
 
-      if (!part.shape.closed) continue;
+      if (!part.closed) continue;
 
       const outerLine = part.shape.offset(-nozzleRadius, offsetOptions);
 
       if (outerLine.paths.length > 0) {
-        part.outerLine.join(outerLine);
+        part.shell.push(outerLine);
 
         // start with 1 because outerLine is the 1st (0) shell
-        for (let shell = 1; shell < shells; shell += 1) {
-          const offset = shell * nozzleDiameter;
+        for (let inset = 1; inset < numShells; inset += 1) {
+          const offset = inset * nozzleDiameter;
 
-          const innerLine = outerLine.offset(-offset, offsetOptions);
+          const shell = outerLine.offset(-offset, offsetOptions);
 
-          if (innerLine.paths.length > 0) {
-            part.innerLines.push(innerLine);
+          if (shell.paths.length > 0) {
+            part.shell.push(shell);
           } else {
             break;
           }
diff --git a/src/sliceActions/generateOutlines.js b/src/sliceActions/generateOutlines.js
index 9fca57b..036b519 100644
--- a/src/sliceActions/generateOutlines.js
+++ b/src/sliceActions/generateOutlines.js
@@ -5,7 +5,10 @@ export default function calculateOutlines(slices, settings) {
     const slice = slices[layer];
 
     slice.outline = slice.parts.reduce((shape, part) => {
-      if (part.outerLine) shape.join(part.outerLine);
+      if (part.closed) {
+        const [outerLine] = part.shell;
+        shape.join(outerLine);
+      }
       return shape;
     }, new Shape([], true));
   }
diff --git a/src/sliceActions/helpers/GCode.js b/src/sliceActions/helpers/GCode.js
index 48bc6dc..4323ce9 100644
--- a/src/sliceActions/helpers/GCode.js
+++ b/src/sliceActions/helpers/GCode.js
@@ -10,16 +10,15 @@ const POSITION_Y = 'Y';
 const POSITION_Z = 'Z';
 
 export default class {
-  constructor(settings) {
+  constructor(nozzleToFilamentRatio) {
+    this._nozzleToFilamentRatio = nozzleToFilamentRatio;
+
     this._gcode = '';
     this._currentValues = {};
-    this._settings = settings;
     this._nozzlePosition = new THREE.Vector2(0, 0);
     this._extruder = 0.0;
     this._isRetracted = false;
     this._isFanOn = false;
-
-    this.bottom = true;
   }
 
   _addGCode(command) {
@@ -62,14 +61,8 @@ export default class {
     return this;
   }
 
-  moveTo(x, y, layer) {
-    const {
-      layerHeight,
-      travelSpeed
-    } = this._settings;
-
-    const z = layer * layerHeight + 0.2;
-    const speed = travelSpeed * 60;
+  moveTo(x, y, z, { speed }) {
+    speed *= 60;
 
     this._addGCode({
       [MOVE]: 0,
@@ -84,30 +77,13 @@ export default class {
     return this;
   }
 
-  lineTo(x, y, layer, type) {
+  lineTo(x, y, z, { speed, flowRate }) {
     const newNozzlePosition = new THREE.Vector2(x, y);
 
-    const {
-      layerHeight,
-      nozzleDiameter,
-      filamentThickness,
-      travelSpeed
-    } = this._settings;
-
-    const profile = this._settings[(this.bottom ? 'bottom' : type)];
-
-    let {
-      speed,
-      flowRate
-    } = profile;
-
     speed *= 60;
-    const z = layer * layerHeight + 0.2;
 
     const lineLength = this._nozzlePosition.distanceTo(newNozzlePosition);
-
-    const filamentSurfaceArea = Math.pow((filamentThickness / 2), 2) * Math.PI;
-    this._extruder += lineLength * ((nozzleDiameter * layerHeight) / filamentSurfaceArea) * flowRate;
+    this._extruder += this._nozzleToFilamentRatio * lineLength * flowRate;
 
     this._addGCode({
       [MOVE]: 1,
@@ -123,21 +99,13 @@ export default class {
     return this;
   }
 
-  unRetract() {
-    const {
-      retraction: {
-        enabled: retractionEnabled,
-        minDistance: retractionMinDistance,
-        speed: retractionSpeed
-      }
-    } = this._settings;
-
-    if (this._isRetracted && retractionEnabled) {
+  unRetract({ enabled, speed, minDistance }) {
+    if (this._isRetracted && enabled) {
       this._isRetracted = false;
 
-      const speed = retractionSpeed * 60;
+      speed *= 60;
 
-      if (this._extruder > retractionMinDistance) {
+      if (this._extruder > minDistance) {
         this._addGCode({
           [MOVE]: 0,
           [EXTRUDER]: this._extruder.toFixed(3),
@@ -149,25 +117,16 @@ export default class {
     return this;
   }
 
-  retract() {
-    const {
-      retraction: {
-        amount: retractionAmount,
-        enabled: retractionEnabled,
-        minDistance: retractionMinDistance,
-        speed: retractionSpeed
-      }
-    } = this._settings;
-
-    if (!this._isRetracted && retractionEnabled) {
+  retract({ enabled, speed, minDistance, amount }) {
+    if (!this._isRetracted && enabled) {
       this._isRetracted = true;
 
-      const speed = retractionSpeed * 60;
+      speed *= 60;
 
-      if (this._extruder > retractionMinDistance) {
+      if (this._extruder > minDistance) {
         this._addGCode({
           [MOVE]: 0,
-          [EXTRUDER]: (this._extruder - retractionAmount).toFixed(3),
+          [EXTRUDER]: (this._extruder - amount).toFixed(3),
           [SPEED]: speed.toFixed(3)
         });
       }
diff --git a/src/sliceActions/helpers/Slice.js b/src/sliceActions/helpers/Slice.js
index 968f70a..10b22fe 100644
--- a/src/sliceActions/helpers/Slice.js
+++ b/src/sliceActions/helpers/Slice.js
@@ -4,13 +4,13 @@ export default class {
   constructor() {
     this.parts = [];
   }
-  add(shape) {
-    const part = { shape };
+  add(shape, closed) {
+    const part = { shape, closed };
 
-    if (shape.closed) {
-      part.innerLines = [];
-      part.outerLine = new Shape([], true);
-      part.fill = new Shape([], false);
+    if (closed) {
+      part.shell = [];
+      part.innerFill = new Shape([], false);
+      part.outerFill = new Shape([], false);
     }
 
     this.parts.push(part);
diff --git a/src/sliceActions/intersectionsToShapes.js b/src/sliceActions/intersectionsToShapes.js
index c46fc05..f416f79 100644
--- a/src/sliceActions/intersectionsToShapes.js
+++ b/src/sliceActions/intersectionsToShapes.js
@@ -10,8 +10,9 @@ export default function intersectionsToShapes(layerIntersectionIndexes, layerInt
 
     if (intersectionIndexes.length === 0) continue;
 
-    const closedShapes = [];
-    const openShapes = [];
+    const fillShapes = [];
+    const lineShapesOpen = [];
+    const lineShapesClosed = [];
     for (let i = 0; i < intersectionIndexes.length; i ++) {
       let index = intersectionIndexes[i];
 
@@ -107,14 +108,17 @@ export default function intersectionsToShapes(layerIntersectionIndexes, layerInt
       }
 
       if (openGeometry) {
-        if (!openShape) shape.push(shape[0].clone());
-        openShapes.push(shape);
+        if (openShape) {
+          lineShapesOpen.push(shape);
+        } else {
+          lineShapesClosed.push(shape);          
+        }
       } else {
-        closedShapes.push(shape);
+        fillShapes.push(shape);
       }
     }
 
-    layers.push({ closedShapes, openShapes });
+    layers.push({ fillShapes, lineShapesOpen, lineShapesClosed });
   }
 
   return layers;
diff --git a/src/sliceActions/optimizePaths.js b/src/sliceActions/optimizePaths.js
index 5c6e718..18043ef 100644
--- a/src/sliceActions/optimizePaths.js
+++ b/src/sliceActions/optimizePaths.js
@@ -17,7 +17,7 @@ export default function optimizePaths(slices, settings) {
     for (let i = 0; i < slice.parts.length; i ++) {
       const part = slice.parts[i];
 
-      const shape = part.shape.closed ? part.outerLine : part.shape;
+      const shape = part.closed ? part.shell[0] : part.shape;
       const bounds = shape.shapeBounds();
 
       boundingBoxes.set(part, bounds);
@@ -47,24 +47,24 @@ export default function optimizePaths(slices, settings) {
       const [part] = slice.parts.splice(closestPart, 1);
       parts.push(part);
 
-      if (part.shape.closed) {
-        if (part.outerLine.paths.length > 0) {
-          part.outerLine = optimizeShape(part.outerLine, start);
-          start.copy(part.outerLine.lastPoint(true));
+      if (part.closed) {
+        for (let i = 0; i < part.shell.length; i ++) {
+          const shell = part.shell[i];
+
+          if (shell.paths.length === 0) continue;
+
+          part.shell[i] = optimizeShape(shell, start);
+          start.copy(part.shell[i].lastPoint(true));
         }
 
-        for (let i = 0; i < part.innerLines.length; i ++) {
-          const innerLine = part.innerLines[i];
-
-          if (innerLine.paths.length > 0) {
-            part.innerLines[i] = optimizeShape(innerLine, start);
-            start.copy(part.innerLines[i].lastPoint(true));
-          }
+        if (part.outerFill.paths.length > 0) {
+          part.outerFill = optimizeShape(part.outerFill, start);
+          start.copy(part.outerFill.lastPoint(true));
         }
 
-        if (part.fill.paths.length > 0) {
-          part.fill = optimizeShape(part.fill, start);
-          start.copy(part.fill.lastPoint(true));
+        if (part.innerFill.paths.length > 0) {
+          part.innerFill = optimizeShape(part.innerFill, start);
+          start.copy(part.innerFill.lastPoint(true));
         }
       } else {
         part.shape = optimizeShape(part.shape, start);
diff --git a/src/sliceActions/removePrecision.js b/src/sliceActions/removePrecision.js
index ec02f25..2ecd8df 100644
--- a/src/sliceActions/removePrecision.js
+++ b/src/sliceActions/removePrecision.js
@@ -9,13 +9,13 @@ export default function removePrecision(slices) {
     for (let i = 0; i < slice.parts.length; i ++) {
       const part = slice.parts[i];
 
-      if (part.shape.closed) {
-        part.outerLine.scaleDown(inversePrecision);
-        for (let i = 0; i < part.innerLines.length; i ++) {
-          const innerLine = part.innerLines[i];
+      if (part.closed) {
+        for (let i = 0; i < part.shell.length; i ++) {
+          const innerLine = part.shell[i];
           innerLine.scaleDown(inversePrecision);
         }
-        part.fill.scaleDown(inversePrecision);
+        part.innerFill.scaleDown(inversePrecision);
+        part.outerFill.scaleDown(inversePrecision);
       } else {
         part.shape.scaleDown(inversePrecision);
       }
diff --git a/src/sliceActions/shapesToSlices.js b/src/sliceActions/shapesToSlices.js
index ea0e5be..2d0fe94 100644
--- a/src/sliceActions/shapesToSlices.js
+++ b/src/sliceActions/shapesToSlices.js
@@ -9,15 +9,18 @@ export default function shapesToSlices(shapes, settings) {
   const sliceLayers = [];
 
   for (let layer = 0; layer < shapes.length; layer ++) {
-    let { closedShapes, openShapes } = shapes[layer];
+    let { fillShapes, lineShapesOpen, lineShapesClosed } = shapes[layer];
 
-    closedShapes = new Shape(closedShapes, true, true, true, true)
+    fillShapes = new Shape(fillShapes, true, true, true, true)
       .fixOrientation()
       .simplify('pftNonZero')
       .clean(cleanDelta)
       .seperateShapes();
 
-    openShapes = new Shape(openShapes, false, true, true, true);
+    lineShapesClosed = new Shape(lineShapesClosed, true, true, true, true)
+      .clean(cleanDelta);
+
+    lineShapesOpen = new Shape(lineShapesOpen, false, true, true, true);
     //   .clean(cleanDelta);
     // TODO
     // Cleaning is actually wanted here but there is a bug in the clean function
@@ -25,17 +28,24 @@ export default function shapesToSlices(shapes, settings) {
 
     const slice = new Slice();
 
-    for (let i = 0; i < closedShapes.length; i ++) {
-      const closedShape = closedShapes[i];
-      slice.add(closedShape);
+    for (let i = 0; i < fillShapes.length; i ++) {
+      const fillShape = fillShapes[i];
+      slice.add(fillShape, true);
 
-      // if (openShapes.path.length > 0) {
-      //   openShapes = openShapes.difference(closedShape);
+      // if (lineShapesClosed.paths.length > 0) {
+      //   lineShapesClosed = lineShapesClosed.difference(closedShape);
+      // }
+      // if (lineShapesOpen.paths.length > 0) {
+      //   lineShapesOpen = lineShapesOpen.difference(closedShape);
       // }
     }
 
-    if (openShapes.paths.length > 0) {
-      slice.add(openShapes);
+    if (lineShapesClosed.paths.length > 0) {
+      slice.add(lineShapesClosed, false);
+    }
+
+    if (lineShapesOpen.paths.length > 0) {
+      slice.add(lineShapesOpen, false);
     }
 
     sliceLayers.push(slice);
diff --git a/src/sliceActions/slicesToGCode.js b/src/sliceActions/slicesToGCode.js
index 407619a..fd38039 100644
--- a/src/sliceActions/slicesToGCode.js
+++ b/src/sliceActions/slicesToGCode.js
@@ -1,47 +1,80 @@
 import GCode from './helpers/GCode.js';
 
-export default function slicesToGCode(slices, settings) {
-  const gcode = new GCode(settings);
+const PROFILE_TYPES = ['support', 'innerShell', 'outerShell', 'innerInfill', 'outerInfill', 'brim'];
 
+export default function slicesToGCode(slices, settings) {
+  const {
+    layerHeight,
+    filamentThickness,
+    nozzleDiameter,
+    travelSpeed,
+    retraction,
+    travel
+  } = settings;
+
+  const filamentSurfaceArea = Math.pow((filamentThickness / 2), 2) * Math.PI;
+  const lineSurfaceArea = nozzleDiameter * layerHeight;
+  const nozzleToFilamentRatio = lineSurfaceArea / filamentSurfaceArea;
+
+  const gcode = new GCode(nozzleToFilamentRatio);
+
+  const defaultProfile = {
+    travelProfile: travel,
+    retractionProfile: retraction
+  };
+
+  let isFirstLayer = true;
   for (let layer = 0; layer < slices.length; layer ++) {
     const slice = slices[layer];
+    const z = layer * layerHeight + 0.2;
 
     if (layer === 1) {
       gcode.turnFanOn();
-      gcode.bottom = false;
+      isFirstLayer = false;
     }
 
+    const profiles = PROFILE_TYPES.reduce((profiles, profileType) => {
+      profiles[profileType] = {
+        ...defaultProfile,
+        lineProfile: isFirstLayer ? settings.firstLayer : settings[profileType]
+      };
+      return profiles;
+    }, {});
+
     if (typeof slice.brim !== 'undefined') {
-      pathToGCode(gcode, slice.brim, true, true, layer, 'brim');
+      pathToGCode(gcode, slice.brim, true, true, z, profiles.brim);
     }
 
     for (let i = 0; i < slice.parts.length; i ++) {
       const part = slice.parts[i];
 
-      if (part.shape.closed) {
-        pathToGCode(gcode, part.outerLine, false, true, layer, 'outerLine');
+      if (part.closed) {
+        for (let i = 0; i < part.shell.length; i ++) {
+          const shell = part.shell[i];
+          const isOuterShell = i === 0;
 
-        for (let i = 0; i < part.innerLines.length; i ++) {
-          const innerLine = part.innerLines[i];
-          pathToGCode(gcode, innerLine, false, false, layer, 'innerLine');
+          const unRetract = isOuterShell;
+          const profile = isOuterShell ? profiles.outerShell : profiles.innerShell;
+          pathToGCode(gcode, shell, false, unRetract, z, profile);
         }
 
-        pathToGCode(gcode, part.fill, true, false, layer, 'fill');
+        pathToGCode(gcode, part.outerFill, false, false, z, profiles.outerInfill);
+        pathToGCode(gcode, part.innerFill, true, false, z, profiles.innerInfill);
       } else {
         const retract = !(slice.parts.length === 1 && typeof slice.support === 'undefined');
-        pathToGCode(gcode, part.shape, retract, retract, layer, 'outerLine');
+        pathToGCode(gcode, part.shape, retract, retract, z, profiles.outerShell);
       }
     }
 
     if (typeof slice.support !== 'undefined') {
-      pathToGCode(gcode, slice.support, true, true, layer, 'support');
+      pathToGCode(gcode, slice.support, true, true, z, profiles.support);
     }
   }
 
   return gcode.getGCode();
 }
 
-function pathToGCode(gcode, shape, retract, unRetract, layer, type) {
+function pathToGCode(gcode, shape, retract, unRetract, z, { lineProfile, travelProfile, retractionProfile }) {
   const { closed } = shape;
   const paths = shape.mapToLower();
 
@@ -55,18 +88,18 @@ function pathToGCode(gcode, shape, retract, unRetract, layer, type) {
       if (i === 0) {
         // TODO
         // moveTo should impliment combing
-        gcode.moveTo(point.x, point.y, layer);
+        gcode.moveTo(point.x, point.y, z, travelProfile);
 
         if (unRetract) {
-          gcode.unRetract();
+          gcode.unRetract(retractionProfile);
         }
       } else {
-        gcode.lineTo(point.x, point.y, layer, type);
+        gcode.lineTo(point.x, point.y, z, lineProfile);
       }
     }
   }
 
   if (retract) {
-    gcode.retract();
+    gcode.retract(retractionProfile);
   }
 }