diff --git a/src/core/textures/RenderTexture.js b/src/core/textures/RenderTexture.js
index c5551c4..f507829 100644
--- a/src/core/textures/RenderTexture.js
+++ b/src/core/textures/RenderTexture.js
@@ -45,6 +45,16 @@
  */
 function RenderTexture(baseRenderTexture, frame)
 {
+    if(baseRenderTexture instanceof Number)
+    {
+        // we have an old render texture..
+        console.warn('v4 RenderTexture now expects a new BaseRenderTexture. Please use RenderTexture.create(400, 400)')
+
+        var width = baseRenderTexture;
+        var height = frame;
+        
+        baseRenderTexture = new BaseRenderTexture(width, height);
+    }
 
     /**
      * The base texture object that this texture uses

diff --git a/src/core/textures/RenderTexture.js b/src/core/textures/RenderTexture.js
index c5551c4..f507829 100644
--- a/src/core/textures/RenderTexture.js
+++ b/src/core/textures/RenderTexture.js
@@ -45,6 +45,16 @@
  */
 function RenderTexture(baseRenderTexture, frame)
 {
+    if(baseRenderTexture instanceof Number)
+    {
+        // we have an old render texture..
+        console.warn('v4 RenderTexture now expects a new BaseRenderTexture. Please use RenderTexture.create(400, 400)')
+
+        var width = baseRenderTexture;
+        var height = frame;
+        
+        baseRenderTexture = new BaseRenderTexture(width, height);
+    }
 
     /**
      * The base texture object that this texture uses
diff --git a/src/deprecation.js b/src/deprecation.js
index b5cbcce..d3acd36 100644
--- a/src/deprecation.js
+++ b/src/deprecation.js
@@ -233,6 +233,12 @@
     console.warn('generateTexture has moved to the renderer, please use renderer.generateTexture(displayObject)');
 };
 
+core.RenderTexture.prototype.render = function()
+{
+    //displayObject, matrix, clear, updateTransform
+    console.warn('RenderTexture.render is now deprecated, please use renderer.render(displayObject, renderTexture)');
+};
+
 /**
  * @method
  * @private