diff --git a/core/src/processing/core/PApplet.java b/core/src/processing/core/PApplet.java
index d32f26192..51dc0860e 100644
--- a/core/src/processing/core/PApplet.java
+++ b/core/src/processing/core/PApplet.java
@@ -9908,6 +9908,18 @@ public class PApplet extends Applet
   }
 
 
+  public void clip(float a, float b, float c, float d) {
+    if (recorder != null) recorder.clip(a, b, c, d);
+    g.clip(a, b, c, d);
+  }
+
+
+  public void noClip() {
+    if (recorder != null) recorder.noClip();
+    g.noClip();
+  }
+
+
   public void bezierVertex(float x2, float y2,
                            float x3, float y3,
                            float x4, float y4) {
diff --git a/core/src/processing/core/PGraphics.java b/core/src/processing/core/PGraphics.java
index b26a7f604..dd419c659 100644
--- a/core/src/processing/core/PGraphics.java
+++ b/core/src/processing/core/PGraphics.java
@@ -1405,7 +1405,14 @@ public class PGraphics extends PImage implements PConstants {
   }
 
 
+  public void clip(float a, float b, float c, float d) {
+    showMissingWarning("clip");
+  }
 
+  public void noClip() {
+    showMissingWarning("noClip");
+  }
+  
   //////////////////////////////////////////////////////////////
 
   // CURVE/BEZIER VERTEX HANDLING
diff --git a/java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java b/java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java
index 939c7307b..24bb4fe62 100644
--- a/java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java
+++ b/java/libraries/opengl/src/processing/opengl/PGraphicsOpenGL.java
@@ -466,7 +466,9 @@ public class PGraphicsOpenGL extends PGraphics {
   static protected int pointAttribsID;
   
   protected boolean drawing2D;
-  protected PImage textureImage0;  
+  protected PImage textureImage0;
+  
+  protected boolean clip = false;
     
   static public float FLOAT_EPS = Float.MIN_VALUE;
   // Calculation of the Machine Epsilon for float precision. From:
@@ -657,7 +659,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = temp[0];
     
     if (glTextureObjects.containsKey(idx)) {
-      System.err.println("Adding same texture twice");
+      showWarning("Adding same texture twice");
     } else {    
       glTextureObjects.put(idx, false);
     }
@@ -670,7 +672,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glTextureObjects.containsKey(idx)) {
       glTextureObjects.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing texture");
+      showWarning("Trying to finalize non-existing texture");
     }
   }
   
@@ -701,7 +703,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = temp[0];
     
     if (glVertexBuffers.containsKey(idx)) {
-      System.err.println("Adding same VBO twice");
+      showWarning("Adding same VBO twice");
     } else {    
       glVertexBuffers.put(idx, false);
     }
@@ -714,7 +716,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glVertexBuffers.containsKey(idx)) {
       glVertexBuffers.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing VBO");
+      showWarning("Trying to finalize non-existing VBO");
     }
   }
   
@@ -745,7 +747,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = temp[0];
     
     if (glFrameBuffers.containsKey(idx)) {
-      System.err.println("Adding same FBO twice");
+      showWarning("Adding same FBO twice");
     } else {    
       glFrameBuffers.put(idx, false);
     }
@@ -758,7 +760,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glFrameBuffers.containsKey(idx)) {
       glFrameBuffers.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing FBO");
+      showWarning("Trying to finalize non-existing FBO");
     }
   }
   
@@ -789,7 +791,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = temp[0];
     
     if (glRenderBuffers.containsKey(idx)) {
-      System.err.println("Adding same renderbuffer twice");
+      showWarning("Adding same renderbuffer twice");
     } else {    
       glRenderBuffers.put(idx, false);
     }
@@ -802,7 +804,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glRenderBuffers.containsKey(idx)) {
       glRenderBuffers.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing renderbuffer");
+      showWarning("Trying to finalize non-existing renderbuffer");
     }
   }
   
@@ -833,7 +835,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = gl2x.glCreateProgram();    
     
     if (glslPrograms.containsKey(idx)) {
-      System.err.println("Adding same glsl program twice");
+      showWarning("Adding same glsl program twice");
     } else {    
       glslPrograms.put(idx, false);
     }
@@ -846,7 +848,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glslPrograms.containsKey(idx)) {
       glslPrograms.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing glsl program");
+      showWarning("Trying to finalize non-existing glsl program");
     }
   }
   
@@ -874,7 +876,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = gl2x.glCreateShader(GL2.GL_VERTEX_SHADER);
     
     if (glslVertexShaders.containsKey(idx)) {
-      System.err.println("Adding same glsl vertex shader twice");
+      showWarning("Adding same glsl vertex shader twice");
     } else {    
       glslVertexShaders.put(idx, false);
     }
@@ -887,7 +889,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glslVertexShaders.containsKey(idx)) {
       glslVertexShaders.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing glsl vertex shader");
+      showWarning("Trying to finalize non-existing glsl vertex shader");
     }
   }
   
@@ -916,7 +918,7 @@ public class PGraphicsOpenGL extends PGraphics {
     int idx = gl2x.glCreateShader(GL2.GL_FRAGMENT_SHADER);
     
     if (glslFragmentShaders.containsKey(idx)) {
-      System.err.println("Adding same glsl fragment shader twice");
+      showWarning("Adding same glsl fragment shader twice");
     } else {    
       glslFragmentShaders.put(idx, false);
     }
@@ -929,7 +931,7 @@ public class PGraphicsOpenGL extends PGraphics {
     if (glslFragmentShaders.containsKey(idx)) {
       glslFragmentShaders.put(idx, true);
     } else {
-      System.err.println("Trying to finalize non-existing glsl fragment shader");
+      showWarning("Trying to finalize non-existing glsl fragment shader");
     }
   }
   
@@ -1093,7 +1095,7 @@ public class PGraphicsOpenGL extends PGraphics {
   
   public void beginDraw() {
     if (drawing) {
-      System.err.println("P3D: Already called beginDraw().");
+      showWarning("P3D: Already called beginDraw().");
       return;
     }    
     
@@ -1242,7 +1244,7 @@ public class PGraphicsOpenGL extends PGraphics {
     }
     
     if (!drawing) {
-      System.err.println("P3D: Cannot call endDraw() before beginDraw().");
+      showWarning("P3D: Cannot call endDraw() before beginDraw().");
       return;
     }
     
@@ -1639,10 +1641,6 @@ public class PGraphicsOpenGL extends PGraphics {
     } else if (shape == POLYGON) {
       tessellator.tessellatePolygon(false, mode == CLOSE);
     }
-
-    if (mode == TEXT) {
-      
-    }
     
     if (flushMode == FLUSH_AFTER_SHAPE || 
         (flushMode == FLUSH_WHEN_FULL && tess.isFull()) ||
@@ -1765,6 +1763,60 @@ public class PGraphicsOpenGL extends PGraphics {
   }
    
   
+  public void clip(float a, float b, float c, float d) {        
+    if (imageMode == CORNER) {
+      if (c < 0) {  // reset a negative width
+        a += c; c = -c;
+      }
+      if (d < 0) {  // reset a negative height
+        b += d; d = -d;
+      }
+
+      clipImpl(a, b, a + c, b + d);
+
+    } else if (imageMode == CORNERS) {
+      if (c < a) {  // reverse because x2 < x1
+        float temp = a; a = c; c = temp;
+      }
+      if (d < b) {  // reverse because y2 < y1
+        float temp = b; b = d; d = temp;
+      }
+
+      clipImpl(a, b, c, d);
+      
+    } else if (imageMode == CENTER) {
+      // c and d are width/height
+      if (c < 0) c = -c;
+      if (d < 0) d = -d;
+      float x1 = a - c/2;
+      float y1 = b - d/2;
+
+      clipImpl(x1, y1, x1 + c, y1 + d);
+    }  
+  }
+
+  
+  protected void clipImpl(float x1, float y1, float x2, float y2) {
+    flush();
+    gl.glEnable(GL.GL_SCISSOR_TEST);
+    
+    float h = y2 - y1;
+    gl.glScissor((int)x1, (int)(height - y1 - h), (int)(x2 - x1), (int)h);
+    
+    clip = true;
+  }
+
+  
+  public void noClip() {
+    if (clip) {
+      flush();
+      gl.glDisable(GL.GL_SCISSOR_TEST);
+      
+      clip = false;
+    }
+  }  
+  
+  
   //////////////////////////////////////////////////////////////
 
   // RENDERING
@@ -2922,10 +2974,6 @@ public class PGraphicsOpenGL extends PGraphics {
 
   protected void textCharModelImpl(PFontTexture.TextureInfo info, float x0, float y0,
       float x1, float y1) {
-//    if (textTex.currentTex != info.texIndex) {
-//      textTex.setTexture(info.texIndex);
-//    }       
-    
     PImage tex = textTex.getTexture(info.texIndex);
     
     beginShape(QUADS);
@@ -2934,7 +2982,7 @@ public class PGraphicsOpenGL extends PGraphics {
     vertex(x1, y0, info.u1, info.v0);
     vertex(x1, y1, info.u1, info.v1);
     vertex(x0, y1, info.u0, info.v1);
-    endShape(TEXT);
+    endShape();
   }
   
   
diff --git a/java/libraries/opengl/src/processing/opengl/PShader.java b/java/libraries/opengl/src/processing/opengl/PShader.java
index 7130da682..eef38097a 100644
--- a/java/libraries/opengl/src/processing/opengl/PShader.java
+++ b/java/libraries/opengl/src/processing/opengl/PShader.java
@@ -118,7 +118,7 @@ public class PShader {
       shaderSource = PApplet.join(PApplet.loadStrings(url.openStream()), "\n");
       attachVertexShader(shaderSource, url.getFile());
     } catch (IOException e) {
-      System.err.println("Cannot load file " + url.getFile());
+      PGraphics.showException("Cannot load shader " + url.getFile());
     }
   }
 
@@ -147,7 +147,7 @@ public class PShader {
       shaderSource = PApplet.join(PApplet.loadStrings(url.openStream()), "\n");
       attachFragmentShader(shaderSource, url.getFile());
     } catch (IOException e) {
-      System.err.println("Cannot load file " + url.getFile());
+      PGraphics.showException("Cannot load shader " + url.getFile());
     }
   }
   
@@ -173,7 +173,7 @@ public class PShader {
    */
   public void start() {
     if (!initialized) {
-      System.err.println("This shader is not properly initialized. Call the setup() method first");
+      PGraphics.showWarning("This shader is not properly initialized. Call the setup() method first");
     }
     
     // TODO:
diff --git a/java/libraries/opengl/src/processing/opengl/PShape3D.java b/java/libraries/opengl/src/processing/opengl/PShape3D.java
index 6511832e6..59924ae84 100644
--- a/java/libraries/opengl/src/processing/opengl/PShape3D.java
+++ b/java/libraries/opengl/src/processing/opengl/PShape3D.java
@@ -291,7 +291,7 @@ public class PShape3D extends PShape {
   
   protected void vertexImpl(float x, float y, float z, float u, float v, int code) {
     if (family != GEOMETRY && family != PATH) {      
-      System.err.println("Cannot add vertices to GROUP of PRIMITIVE shape");
+      PGraphics.showWarning("Cannot add vertices to GROUP of PRIMITIVE shape");
       return;
     }
 
@@ -1249,7 +1249,7 @@ public class PShape3D extends PShape {
       modified = true;
       child.modified = true;
     } else {
-      System.err.println("Cannot add child shape to non-group shape.");
+      PGraphics.showWarning("Cannot add child shape to non-group shape.");
     }
   }
   
diff --git a/java/libraries/opengl/src/processing/opengl/PTexture.java b/java/libraries/opengl/src/processing/opengl/PTexture.java
index 3b2f7d656..a13f003ed 100644
--- a/java/libraries/opengl/src/processing/opengl/PTexture.java
+++ b/java/libraries/opengl/src/processing/opengl/PTexture.java
@@ -27,6 +27,7 @@ import javax.media.opengl.GL2;
 import java.nio.*;
 import processing.core.PApplet;
 import processing.core.PConstants;
+import processing.core.PGraphics;
 import processing.core.PImage;
 
 /**
@@ -256,11 +257,11 @@ public class PTexture implements PConstants {
   
   public void set(int[] pixels, int x, int y, int w, int h, int format) {
     if (pixels == null) {
-      System.err.println("PTexture: null pixels array");
+      PGraphics.showWarning("The pixels array is null.");
       return;
     }    
     if (pixels.length != w * h) {
-      System.err.println("PTexture: wrong length of pixels array");
+      PGraphics.showWarning("The pixels array has the wrong length. It should be " + w * h);
       return;
     }
     
diff --git a/java/libraries/video/src/processing/video/Capture.java b/java/libraries/video/src/processing/video/Capture.java
index ea706ca79..d88b6a0a9 100644
--- a/java/libraries/video/src/processing/video/Capture.java
+++ b/java/libraries/video/src/processing/video/Capture.java
@@ -194,7 +194,7 @@ public class Capture extends PImage implements PConstants {
           gpipeline.stop();
         }
       } catch (IllegalStateException e) {
-        System.err.println("error when deleting player, maybe some native resource is already disposed"); 
+        PGraphics.showWarning("Error when deleting player, maybe some native resource is already disposed"); 
       } catch (Exception e) {
         e.printStackTrace();
       }
@@ -441,7 +441,7 @@ public class Capture extends PImage implements PConstants {
           res[i] = devices.get(i);
         }
       } else {      
-        System.err.println("The capture plugin doesn't support device query!");
+        PGraphics.showWarning("The capture plugin doesn't support device query!");
         res = new String[0];
       }
     }
@@ -729,11 +729,11 @@ public class Capture extends PImage implements PConstants {
       if (!fps.equals("")) {
         fpsStr = ", " + fps + "fps";
       }      
-      System.err.println("The requested resolution of " + reqWidth + "x" + reqHeight + fpsStr + " is not supported by selected the capture device.");
-      System.err.println("Use one of the following resolutions instead:");
+      PGraphics.showWarning("The requested resolution of " + reqWidth + "x" + reqHeight + fpsStr + " is not supported by selected the capture device.");
+      PGraphics.showWarning("Use one of the following resolutions instead:");
       for (int i = 0; i < resolutions.size(); i++) {
         Resolution res = resolutions.get(i);
-        System.err.println(res.toString());
+        PGraphics.showWarning(res.toString());
       }
     }     
   }
diff --git a/java/libraries/video/src/processing/video/Movie.java b/java/libraries/video/src/processing/video/Movie.java
index b001efffb..2e977e7e0 100644
--- a/java/libraries/video/src/processing/video/Movie.java
+++ b/java/libraries/video/src/processing/video/Movie.java
@@ -108,7 +108,7 @@ public class Movie extends PImage implements PConstants {
           gplayer.stop();
         }
       } catch (IllegalStateException e) {
-        System.err.println("error when deleting player, maybe some native resource is already disposed"); 
+        PGraphics.showWarning("error when deleting player, maybe some native resource is already disposed"); 
       } catch (Exception e) {
         e.printStackTrace();
       }
@@ -230,7 +230,7 @@ public class Movie extends PImage implements PConstants {
                        SeekType.SET, start, SeekType.SET, stop);
               
     if (!res) {
-      System.err.println("Seek operation failed.");
+      PGraphics.showWarning("Seek operation failed.");
     }
     
     if (playing) {
@@ -327,7 +327,7 @@ public class Movie extends PImage implements PConstants {
                        SeekType.SET, pos, SeekType.NONE, -1);
     
     if (!res) {
-      System.err.println("Seek operation failed.");
+      PGraphics.showWarning("Seek operation failed.");
     }    
     
     // getState() will wait until any async state change