diff --git a/core/src/processing/core/PShape.java b/core/src/processing/core/PShape.java
index c26217adb..927f8f512 100644
--- a/core/src/processing/core/PShape.java
+++ b/core/src/processing/core/PShape.java
@@ -197,7 +197,8 @@ public class PShape implements PConstants {
   /** True if colorMode(RGB, 255) */
   boolean colorModeDefault; // = true;
   
-  
+  /** To mark the shape dirty upon changes in its geometry **/
+  public boolean modified;
   
   // should this be called vertices (consistent with PGraphics internals)
   // or does that hurt flexibility?
@@ -389,7 +390,161 @@ public class PShape implements PConstants {
   public boolean is3D() {
     return false;
   }
+  
+  
+  ///////////////////////////////////////////////////////////  
+  
+  //
+  
+  // Drawing methods  
+  
+  public void texture(PImage tex) {
+  }
+  
+  public void noTexture() {
+  }  
+    
+  public void solid(boolean solid) {
+  }
+  
+  public void beginContour() {
+  }
+    
+  public void endContour() {
+  }
+  
+  public void vertex(float x, float y) { 
+  }
 
+  
+  public void vertex(float x, float y, float z) {
+  }
+
+  public void vertex(float x, float y, float z, float u, float v) {
+  }  
+  
+  public void normal(float nx, float ny, float nz) {
+  }
+
+  public void end() {
+  }  
+
+  public void end(int mode) {    
+  }    
+  
+  //////////////////////////////////////////////////////////////
+
+  // STROKE CAP/JOIN/WEIGHT
+
+  
+  public void strokeWeight(float weight) {
+  }
+
+  public void strokeJoin(int join) {
+  }
+
+  public void strokeCap(int cap) {
+  }  
+  
+  //////////////////////////////////////////////////////////////
+
+  // FILL COLOR
+
+  public void noFill() {
+  }
+
+  public void fill(int rgb) {
+  }
+
+  public void fill(int rgb, float alpha) {
+  }
+
+  public void fill(float gray) {
+  }
+
+  public void fill(float gray, float alpha) {
+  }
+
+  public void fill(float x, float y, float z) {
+  }
+
+  public void fill(float x, float y, float z, float a) {
+  }  
+  
+  //////////////////////////////////////////////////////////////
+
+  // STROKE COLOR 
+  
+  
+  public void noStroke() {
+  }  
+  
+  public void stroke(int rgb) {
+  }  
+  
+  public void stroke(int rgb, float alpha) {
+  }
+  
+  public void stroke(float gray) {
+  }
+  
+  public void stroke(float gray, float alpha) {
+  }
+
+  public void stroke(float x, float y, float z) {
+  }
+  
+  public void stroke(float x, float y, float z, float alpha) {
+  }
+
+  ///////////////////////////////////////////////////////////  
+  
+  //
+  
+  // Bezier curves   
+  
+  
+  public void bezierDetail(int detail) {
+  }  
+  
+  public void bezierVertex(float x2, float y2,
+                           float x3, float y3,
+                           float x4, float y4) {
+  }
+  
+  public void bezierVertex(float x2, float y2, float z2,
+                           float x3, float y3, float z3,
+                           float x4, float y4, float z4) {
+  }
+  
+  public void quadraticVertex(float cx, float cy,
+                              float x3, float y3) {
+  }  
+  
+  public void quadraticVertex(float cx, float cy, float cz,
+                              float x3, float y3, float z3) {
+  }
+  
+  ///////////////////////////////////////////////////////////  
+  
+  //
+  
+  // Catmull-Rom curves
+
+  public void curveDetail(int detail) {
+  }
+  
+  public void curveTightness(float tightness) {
+  }  
+  
+  public void curveVertex(float x, float y) {
+  }  
+
+  public void curveVertex(float x, float y, float z) {
+  }
+  
+  
+  
   // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
 
@@ -915,13 +1070,11 @@ public class PShape implements PConstants {
     return -1;
   }
 
-
-//  public PShape createGroup() {
-//    PShape group = new PShape();
-//    group.kind = GROUP;
-//    addChild(group);
-//    return group;
-//  }
+  public void addShape(PShape child) {    
+  }
+  
+  public void updateRoot(PShape root) {    
+  }
 
 
   // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
diff --git a/java/libraries/opengl/examples/Retained/PolyRetain/PolyRetain.pde b/java/libraries/opengl/examples/Retained/PolyRetain/PolyRetain.pde
index 54b260c06..80d06279b 100755
--- a/java/libraries/opengl/examples/Retained/PolyRetain/PolyRetain.pde
+++ b/java/libraries/opengl/examples/Retained/PolyRetain/PolyRetain.pde
@@ -1,6 +1,6 @@
 size(100, 100, P3D);
 
-PShape3D obj = (PShape3D)createShape(POLYGON);
+PShape obj = createShape(POLYGON);
 obj.fill(0, 255, 0, 255);
 obj.stroke(0, 0, 255, 255);
 obj.strokeWeight(5);
diff --git a/java/libraries/opengl/examples/Retained/Primitive/Primitive.pde b/java/libraries/opengl/examples/Retained/Primitive/Primitive.pde
index 6d94fafda..03442c482 100644
--- a/java/libraries/opengl/examples/Retained/Primitive/Primitive.pde
+++ b/java/libraries/opengl/examples/Retained/Primitive/Primitive.pde
@@ -1,4 +1,4 @@
-PShape3D circle;
+PShape circle;
   
 public void setup() {
   size(400, 400, P3D);
@@ -7,7 +7,7 @@ public void setup() {
   fill(255, 0, 0);
   stroke(0, 0, 255);  
   strokeWeight(3);
-  circle = (PShape3D) createShape(ELLIPSE, 0, 0, 100, 100);  
+  circle = createShape(ELLIPSE, 0, 0, 100, 100);  
 } 
 
 public void draw () {	  
@@ -18,7 +18,6 @@ public void draw () {
     circle.stroke(0, 0, map(mouseY, 0, height, 255, 0));
   }
   
-  
   translate(mouseX, mouseY);
   shape(circle);  
 }
diff --git a/java/libraries/opengl/examples/Retained/Shape2_18/Shape2_18.pde b/java/libraries/opengl/examples/Retained/Shape2_18/Shape2_18.pde
index 8403caa95..6327696de 100755
--- a/java/libraries/opengl/examples/Retained/Shape2_18/Shape2_18.pde
+++ b/java/libraries/opengl/examples/Retained/Shape2_18/Shape2_18.pde
@@ -1,7 +1,7 @@
 size(100, 100, P3D);
 smooth();
 
-PShape3D obj = (PShape3D)createShape();
+PShape obj = createShape();
 obj.noFill();
 obj.stroke(0);
 obj.strokeWeight(1);
diff --git a/java/libraries/opengl/src/processing/opengl/PShape3D.java b/java/libraries/opengl/src/processing/opengl/PShape3D.java
index 9b60ba375..dad083e3c 100644
--- a/java/libraries/opengl/src/processing/opengl/PShape3D.java
+++ b/java/libraries/opengl/src/processing/opengl/PShape3D.java
@@ -294,6 +294,27 @@ public class PShape3D extends PShape {
     }
   }
   
+  public void addShape(PShape child) {
+    if (family == GROUP) {
+      super.addChild(child);
+      child.updateRoot(root);
+      root.modified = true;
+      modified = true;
+      child.modified = true;
+    } else {
+      PGraphics.showWarning("Cannot add child shape to non-group shape.");
+    }
+  }  
+  
+  public void updateRoot(PShape root) {
+    this.root = (PShape3D) root;
+    if (family == GROUP) {
+      for (int i = 0; i < childCount; i++) {
+        PShape3D child = (PShape3D)children[i];
+        child.updateRoot(root);
+      }
+    }
+  }      
   
   protected void finalize() throws Throwable {
     try {
@@ -1651,28 +1672,6 @@ public class PShape3D extends PShape {
     getGl().glBindBuffer(GL.GL_ARRAY_BUFFER, 0);   
   }    
 
-  public void addShape(PShape3D child) {
-    if (family == GROUP) {
-      super.addChild(child);
-      child.updateRoot(root);
-      root.modified = true;
-      modified = true;
-      child.modified = true;
-    } else {
-      PGraphics.showWarning("Cannot add child shape to non-group shape.");
-    }
-  }
-  
-  private void updateRoot(PShape3D root) {
-    this.root = root;
-    if (family == GROUP) {
-      for (int i = 0; i < childCount; i++) {
-        PShape3D child = (PShape3D)children[i];
-        child.updateRoot(root);
-      }
-    }
-  }  
-  
   
   ///////////////////////////////////////////////////////////