diff --git a/cura/LayerPolygon.py b/cura/LayerPolygon.py
index 628fd78350..858fa11c77 100644
--- a/cura/LayerPolygon.py
+++ b/cura/LayerPolygon.py
@@ -18,13 +18,14 @@ class LayerPolygon:
     
     __jump_map = numpy.logical_or(numpy.logical_or(numpy.arange(11) == NoneType, numpy.arange(11) == MoveCombingType), numpy.arange(11) == MoveRetractionType)
     
-    def __init__(self, mesh, extruder, line_types, data, line_widths):
+    def __init__(self, mesh, extruder, line_types, data, line_widths, line_thicknesses):
         self._mesh = mesh
         self._extruder = extruder
         self._types = line_types
         self._data = data
         self._line_widths = line_widths
-        
+        self._line_thicknesses = line_thicknesses
+
         self._vertex_begin = 0
         self._vertex_end = 0
         self._index_begin = 0
@@ -89,8 +90,8 @@ class LayerPolygon:
         colors[self._vertex_begin:self._vertex_end, :] *= numpy.array([[0.5, 0.5, 0.5, 1.0]], numpy.float32)
 
         # Create an array with line widths for each vertex.
-        line_dimensions[self._vertex_begin:self._vertex_end, :] = numpy.tile(self._line_widths, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()]
-        line_dimensions[self._vertex_begin:self._vertex_end, 1] = thickness
+        line_dimensions[self._vertex_begin:self._vertex_end, 0] = numpy.tile(self._line_widths, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()][:, 0]
+        line_dimensions[self._vertex_begin:self._vertex_end, 1] = numpy.tile(self._line_thicknesses, (1, 2)).reshape((-1, 1))[needed_points_list.ravel()][:, 0]
 
         # The relative values of begin and end indices have already been set in buildCache, so we only need to offset them to the parents offset.
         self._index_begin += index_offset
diff --git a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
index f8b80e9da0..7b814d99b4 100644
--- a/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
+++ b/plugins/CuraEngineBackend/ProcessSlicedLayersJob.py
@@ -92,7 +92,6 @@ class ProcessSlicedLayersJob(Job):
             layer_data.addLayer(abs_layer_number)
             this_layer = layer_data.getLayer(abs_layer_number)
             layer_data.setLayerHeight(abs_layer_number, layer.height)
-            layer_data.setLayerThickness(abs_layer_number, layer.thickness)
 
             for p in range(layer.repeatedMessageCount("path_segment")):
                 polygon = layer.getRepeatedMessage("path_segment", p)
@@ -110,7 +109,12 @@ class ProcessSlicedLayersJob(Job):
 
                 line_widths = numpy.fromstring(polygon.line_width, dtype="f4")  # Convert bytearray to numpy array
                 line_widths = line_widths.reshape((-1,1))  # We get a linear list of pairs that make up the points, so make numpy interpret them correctly.
-                
+
+                # In the future, line_thicknesses should be given by CuraEngine as well.
+                # Currently the infill layer thickness also translates to line width
+                line_thicknesses = numpy.zeros(line_widths.shape, dtype="f4")
+                line_thicknesses[:] = layer.thickness / 1000  # from micrometer to millimeter
+
                 # Create a new 3D-array, copy the 2D points over and insert the right height.
                 # This uses manual array creation + copy rather than numpy.insert since this is
                 # faster.
@@ -124,7 +128,7 @@ class ProcessSlicedLayersJob(Job):
                     new_points[:, 1] = points[:, 2]
                     new_points[:, 2] = -points[:, 1]
 
-                this_poly = LayerPolygon.LayerPolygon(layer_data, extruder, line_types, new_points, line_widths)
+                this_poly = LayerPolygon.LayerPolygon(layer_data, extruder, line_types, new_points, line_widths, line_thicknesses)
                 this_poly.buildCache()
 
                 this_layer.polygons.append(this_poly)