diff --git a/src/ol/render/webgl/polygonreplay.js b/src/ol/render/webgl/polygonreplay.js
index 80809c234e..7c442f8a0f 100644
--- a/src/ol/render/webgl/polygonreplay.js
+++ b/src/ol/render/webgl/polygonreplay.js
@@ -88,17 +88,33 @@ if (ol.ENABLE_WEBGL) {
       for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {
         var holeList = {
           list: new ol.structs.LinkedList(),
-          maxX: undefined
+          maxX: undefined,
+          rtree: new ol.structs.RBush()
         };
         holeLists.push(holeList);
         holeList.maxX = this.processFlatCoordinates_(holeFlatCoordinates[i],
-            stride, holeList.list, rtree, false);
+            stride, holeList.list, holeList.rtree, false);
       }
       holeLists.sort(function(a, b) {
         return b.maxX - a.maxX;
       });
       for (i = 0; i < holeLists.length; ++i) {
-        this.bridgeHole_(holeLists[i].list, holeLists[i].maxX, outerRing, maxX, rtree);
+        var currList = holeLists[i].list;
+        var start = currList.firstItem();
+        var currItem = start;
+        var intersection;
+        do {
+          if (this.getIntersections_(currItem, rtree).length) {
+            intersection = true;
+            break;
+          }
+          currItem = currList.nextItem();
+        } while (start !== currItem);
+        if (!intersection) {
+          this.classifyPoints_(currList, holeLists[i].rtree, true);
+          this.bridgeHole_(currList, holeLists[i].maxX, outerRing, maxX, rtree);
+          rtree.concat(holeLists[i].rtree);
+        }
       }
     }
     this.classifyPoints_(outerRing, rtree, false);
@@ -215,7 +231,6 @@ if (ol.ENABLE_WEBGL) {
    */
   ol.render.webgl.PolygonReplay.prototype.bridgeHole_ = function(hole, holeMaxX,
       list, listMaxX, rtree) {
-    this.classifyPoints_(hole, rtree, true);
     var seg = hole.firstItem();
     while (seg.p1.x !== holeMaxX) {
       seg = hole.nextItem();
@@ -761,7 +776,7 @@ if (ol.ENABLE_WEBGL) {
     var ends = polygonGeometry.getEnds();
     var stride = polygonGeometry.getStride();
     if (ends.length > 0) {
-      var flatCoordinates = polygonGeometry.getFlatCoordinates();
+      var flatCoordinates = polygonGeometry.getFlatCoordinates().map(Number);
       var outerRing = ol.geom.flat.transform.translate(flatCoordinates, 0, ends[0],
           stride, -this.origin[0], -this.origin[1]);
       if (outerRing.length) {
diff --git a/src/ol/structs/rbush.js b/src/ol/structs/rbush.js
index 0828832452..f802507dad 100644
--- a/src/ol/structs/rbush.js
+++ b/src/ol/structs/rbush.js
@@ -215,3 +215,14 @@ ol.structs.RBush.prototype.getExtent = function(opt_extent) {
   var data = this.rbush_.data;
   return ol.extent.createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, opt_extent);
 };
+
+
+/**
+ * @param {ol.structs.RBush} rbush R-Tree.
+ */
+ol.structs.RBush.prototype.concat = function(rbush) {
+  this.rbush_.load(rbush.rbush_.all());
+  for (var i in rbush.items_) {
+    this.items_[i | 0] = rbush.items_[i | 0];
+  }
+};
diff --git a/test/spec/ol/structs/rbush.test.js b/test/spec/ol/structs/rbush.test.js
index 1e9741ce83..2ff46ab541 100644
--- a/test/spec/ol/structs/rbush.test.js
+++ b/test/spec/ol/structs/rbush.test.js
@@ -313,4 +313,29 @@ describe('ol.structs.RBush', function() {
 
   });
 
+  describe('#concat', function() {
+
+    it('concatenates two RBush objects', function() {
+      var obj1 = {};
+      var obj2 = {};
+      var rBush2 = new ol.structs.RBush();
+      rBush.insert([0, 0, 1, 1], obj1);
+      rBush2.insert([0, 0, 2, 2], obj2);
+      rBush.concat(rBush2);
+      expect(rBush.getExtent()).to.eql([0, 0, 2, 2]);
+      expect(rBush.getAll().length).to.be(2);
+    });
+
+    it('preserves the concatenated object\'s references', function() {
+      var obj1 = {};
+      var obj2 = {};
+      var rBush2 = new ol.structs.RBush();
+      rBush.insert([0, 0, 1, 1], obj1);
+      rBush2.insert([0, 0, 2, 2], obj2);
+      rBush.concat(rBush2);
+      rBush.update([0, 0, 3, 3], obj2);
+      expect(rBush.getExtent()).to.eql([0, 0, 3, 3]);
+    });
+  });
+
 });