diff --git a/cura/LayerDataBuilder.py b/cura/LayerDataBuilder.py
old mode 100644
new mode 100755
index 7cb6f75df3..df4b9e3218
--- a/cura/LayerDataBuilder.py
+++ b/cura/LayerDataBuilder.py
@@ -63,7 +63,7 @@ class LayerDataBuilder(MeshBuilder):
         line_dimensions = numpy.empty((vertex_count, 2), numpy.float32)
         colors = numpy.empty((vertex_count, 4), numpy.float32)
         indices = numpy.empty((index_count, 2), numpy.int32)
-        extruders = numpy.empty((vertex_count), numpy.int32)  # Only usable for newer OpenGL versions
+        extruders = numpy.empty((vertex_count), numpy.float32)
         line_types = numpy.empty((vertex_count), numpy.float32)
 
         vertex_offset = 0
diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
old mode 100644
new mode 100755
index ab6e0a08a5..3aa226c518
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -517,7 +517,6 @@ class CuraEngineBackend(QObject, Backend):
     #   \param tool The tool that the user was using.
     def _onToolOperationStopped(self, tool):
         self._tool_active = False  # React on scene change again
-        self.determineAutoSlicing()
         # Process all the postponed scene changes
         while self._postponed_scene_change_sources:
             source = self._postponed_scene_change_sources.pop(0)
diff --git a/plugins/LayerView/LayerPass.py b/plugins/LayerView/LayerPass.py
old mode 100644
new mode 100755
diff --git a/plugins/LayerView/layers.shader b/plugins/LayerView/layers.shader
old mode 100644
new mode 100755
diff --git a/plugins/LayerView/layers3d.shader b/plugins/LayerView/layers3d.shader
old mode 100644
new mode 100755
index 5bc6066152..2108d85eb2
--- a/plugins/LayerView/layers3d.shader
+++ b/plugins/LayerView/layers3d.shader
@@ -16,7 +16,7 @@ vertex41core =
     in lowp vec4 a_material_color;
     in highp vec4 a_normal;
     in highp vec2 a_line_dim;  // line width and thickness
-    in highp int a_extruder;  // Note: cannot use this in compatibility, int is only available in newer OpenGL.
+    in highp float a_extruder;
     in highp float a_line_type;
 
     out lowp vec4 v_color;
@@ -53,7 +53,7 @@ vertex41core =
         v_vertex = world_space_vert.xyz;
         v_normal = (u_normalMatrix * normalize(a_normal)).xyz;
         v_line_dim = a_line_dim;
-        v_extruder = a_extruder;
+        v_extruder = int(a_extruder);
         v_line_type = a_line_type;
         v_extruder_opacity = u_extruder_opacity;