diff --git a/src/core/display/Container.js b/src/core/display/Container.js
index 537c72c..3185818 100644
--- a/src/core/display/Container.js
+++ b/src/core/display/Container.js
@@ -422,9 +422,11 @@
                 continue;
             }
 
-            childVisible = true;
-
             childBounds = this.children[i].getBounds();
+            if (childBounds === math.Rectangle.EMPTY) {
+                continue;
+            }
+            childVisible = true;
 
             minX = minX < childBounds.x ? minX : childBounds.x;
             minY = minY < childBounds.y ? minY : childBounds.y;
@@ -438,7 +440,7 @@
 
         if (!childVisible)
         {
-            return math.Rectangle.EMPTY;
+            return this._currentBounds = math.Rectangle.EMPTY;
         }
 
         var bounds = this._bounds;

diff --git a/src/core/display/Container.js b/src/core/display/Container.js
index 537c72c..3185818 100644
--- a/src/core/display/Container.js
+++ b/src/core/display/Container.js
@@ -422,9 +422,11 @@
                 continue;
             }
 
-            childVisible = true;
-
             childBounds = this.children[i].getBounds();
+            if (childBounds === math.Rectangle.EMPTY) {
+                continue;
+            }
+            childVisible = true;
 
             minX = minX < childBounds.x ? minX : childBounds.x;
             minY = minY < childBounds.y ? minY : childBounds.y;
@@ -438,7 +440,7 @@
 
         if (!childVisible)
         {
-            return math.Rectangle.EMPTY;
+            return this._currentBounds = math.Rectangle.EMPTY;
         }
 
         var bounds = this._bounds;
diff --git a/src/core/math/shapes/Rectangle.js b/src/core/math/shapes/Rectangle.js
index 7c072f7..4b937ad 100644
--- a/src/core/math/shapes/Rectangle.js
+++ b/src/core/math/shapes/Rectangle.js
@@ -150,3 +150,15 @@
         }
     }
 };
+
+Rectangle.prototype.enlarge = function (rect) {
+    if (rect === Rectangle.EMPTY) return;
+    var x1 = Math.min(this.x, rect.x);
+    var x2 = Math.max(this.x + this.width, rect.x + rect.width);
+    var y1 = Math.min(this.y, rect.y);
+    var y2 = Math.max(this.y + this.height, rect.y + rect.height);
+    this.x = x1;
+    this.width = x2 - x1;
+    this.y = y1;
+    this.height = y2 - y1;
+};

diff --git a/src/core/display/Container.js b/src/core/display/Container.js
index 537c72c..3185818 100644
--- a/src/core/display/Container.js
+++ b/src/core/display/Container.js
@@ -422,9 +422,11 @@
                 continue;
             }
 
-            childVisible = true;
-
             childBounds = this.children[i].getBounds();
+            if (childBounds === math.Rectangle.EMPTY) {
+                continue;
+            }
+            childVisible = true;
 
             minX = minX < childBounds.x ? minX : childBounds.x;
             minY = minY < childBounds.y ? minY : childBounds.y;
@@ -438,7 +440,7 @@
 
         if (!childVisible)
         {
-            return math.Rectangle.EMPTY;
+            return this._currentBounds = math.Rectangle.EMPTY;
         }
 
         var bounds = this._bounds;
diff --git a/src/core/math/shapes/Rectangle.js b/src/core/math/shapes/Rectangle.js
index 7c072f7..4b937ad 100644
--- a/src/core/math/shapes/Rectangle.js
+++ b/src/core/math/shapes/Rectangle.js
@@ -150,3 +150,15 @@
         }
     }
 };
+
+Rectangle.prototype.enlarge = function (rect) {
+    if (rect === Rectangle.EMPTY) return;
+    var x1 = Math.min(this.x, rect.x);
+    var x2 = Math.max(this.x + this.width, rect.x + rect.width);
+    var y1 = Math.min(this.y, rect.y);
+    var y2 = Math.max(this.y + this.height, rect.y + rect.height);
+    this.x = x1;
+    this.width = x2 - x1;
+    this.y = y1;
+    this.height = y2 - y1;
+};
diff --git a/src/flip/index.js b/src/flip/index.js
deleted file mode 100644
index 6715850..0000000
--- a/src/flip/index.js
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * @file       FLIP
- * @author      Mat Groves <mat@goodboydigital.com>
- * @copyright   2013-2015 GoodBoyDigital
- * @license     {@link https://github.com/GoodBoyDigital/pixi.js/blob/master/LICENSE|MIT License}
- */
-
-/**
- * @namespace PIXI
- */
-module.exports = {
-    glMat: require('gl-matrix')
-};