diff --git a/apps/openmw/CMakeLists.txt b/apps/openmw/CMakeLists.txt
index 2dd16a4e6..5a9b52cb2 100644
--- a/apps/openmw/CMakeLists.txt
+++ b/apps/openmw/CMakeLists.txt
@@ -23,6 +23,7 @@ add_openmw_dir (mwrender
     actors objects renderingmanager animation rotatecontroller sky npcanimation vismask
     creatureanimation effectmanager util renderinginterface pathgrid rendermode weaponanimation
     bulletdebugdraw globalmap characterpreview camera localmap water terrainstorage ripplesimulation
+    renderbin
     )
 
 add_openmw_dir (mwinput
diff --git a/apps/openmw/mwrender/renderbin.hpp b/apps/openmw/mwrender/renderbin.hpp
new file mode 100644
index 000000000..63ccdd259
--- /dev/null
+++ b/apps/openmw/mwrender/renderbin.hpp
@@ -0,0 +1,20 @@
+#ifndef OPENMW_MWRENDER_RENDERBIN_H
+#define OPENMW_MWRENDER_RENDERBIN_H
+
+namespace MWRender
+{
+
+    /// Defines the render bin numbers used in the OpenMW scene graph. The bin with the lowest number is rendered first.
+    /// Beware of RenderBin nesting, in most cases you will want to use setNestRenderBins(false).
+    enum RenderBins
+    {
+        RenderBin_Sky = -1,
+        RenderBin_Default = 0,
+        RenderBin_Water = 9,
+        RenderBin_OcclusionQuery = 10,
+        RenderBin_SunGlare = 11
+    };
+
+}
+
+#endif
diff --git a/apps/openmw/mwrender/sky.cpp b/apps/openmw/mwrender/sky.cpp
index 3d2b35c37..8588d2158 100644
--- a/apps/openmw/mwrender/sky.cpp
+++ b/apps/openmw/mwrender/sky.cpp
@@ -41,6 +41,7 @@
 #include "../mwworld/fallback.hpp"
 
 #include "vismask.hpp"
+#include "renderbin.hpp"
 
 namespace
 {
@@ -376,7 +377,7 @@ public:
         osg::ref_ptr<osg::PositionAttitudeTransform> queryTransform (new osg::PositionAttitudeTransform);
         queryTransform->setScale(osg::Vec3f(0.5f, 0.5f, 0.5f));
         // Need to render after the world geometry so we can correctly test for occlusions
-        queryTransform->getOrCreateStateSet()->setRenderBinDetails(10, "RenderBin");
+        queryTransform->getOrCreateStateSet()->setRenderBinDetails(RenderBin_OcclusionQuery, "RenderBin");
         queryTransform->getOrCreateStateSet()->setNestRenderBins(false);
 
         mTransform->addChild(queryTransform);
@@ -680,7 +681,7 @@ SkyManager::SkyManager(osg::Group* parentNode, Resource::SceneManager* sceneMana
     mRootNode = skyroot;
 
     // By default render before the world is rendered
-    mRootNode->getOrCreateStateSet()->setRenderBinDetails(-1, "RenderBin");
+    mRootNode->getOrCreateStateSet()->setRenderBinDetails(RenderBin_Sky, "RenderBin");
 }
 
 void SkyManager::create()
diff --git a/apps/openmw/mwrender/water.cpp b/apps/openmw/mwrender/water.cpp
index b5f141963..03ab58e6b 100644
--- a/apps/openmw/mwrender/water.cpp
+++ b/apps/openmw/mwrender/water.cpp
@@ -21,6 +21,7 @@
 
 #include "vismask.hpp"
 #include "ripplesimulation.hpp"
+#include "renderbin.hpp"
 
 namespace
 {
@@ -86,7 +87,7 @@ namespace
         depth->setWriteMask(false);
         stateset->setAttributeAndModes(depth, osg::StateAttribute::ON);
 
-        stateset->setRenderBinDetails(9, "RenderBin");
+        stateset->setRenderBinDetails(MWRender::RenderBin_Water, "RenderBin");
 
         std::vector<osg::ref_ptr<osg::Texture2D> > textures;
         for (int i=0; i<32; ++i)