diff --git a/zoneb/addons.make b/zoneb/addons.make
index b155bef..0b31261 100644
--- a/zoneb/addons.make
+++ b/zoneb/addons.make
@@ -1 +1,2 @@
 ofxAzureKinect
+ofxShader
diff --git a/zoneb/bin/data/shaders/bound.frag b/zoneb/bin/data/shaders/bound.frag
new file mode 100644
index 0000000..d8dec0b
--- /dev/null
+++ b/zoneb/bin/data/shaders/bound.frag
@@ -0,0 +1,94 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform sampler2D   u_depth;
+uniform sampler2D   u_buffer0;
+uniform sampler2D   u_buffer1;
+
+uniform vec2        u_resolution;
+uniform vec2        u_mouse;
+uniform float       u_time;
+
+uniform bool        u_init;
+
+varying vec2        v_texcoord;
+
+void main() {
+  vec2 st = v_texcoord;
+  // st.y = 1.0 - st.y;
+
+
+#ifdef BUFFER_0
+  // PING BUFFER
+  //
+  //  Note: Here is where most of the action happens. But need's to read
+  //  te content of the previous pass, for that we are making another buffer
+  //  BUFFER_1 (u_buffer1)
+  vec4 color = vec4(0,0,0,1);
+  if(u_init) {
+    float tmp = texture2D(u_depth, st).r;
+    if(tmp > 0.005) {
+      color.rgb = vec3(1);
+    }
+  }
+  else {
+    vec2 pixel = 1./u_resolution;
+
+    float kernel[9];
+    kernel[0] = 0.125;
+    kernel[1] = 0.25;
+    kernel[2] = 0.125;
+    kernel[3] = 0.25;
+    kernel[4] = 1.0;
+    kernel[5] = 0.25;
+    kernel[6] = 0.125;
+    kernel[7] = 0.25;
+    kernel[8] = 0.125;
+
+    vec2 offset[9];
+    offset[0] = pixel * vec2(-1.0,-1.0);
+    offset[1] = pixel * vec2( 0.0,-1.0);
+    offset[2] = pixel * vec2( 1.0,-1.0);
+
+    offset[3] = pixel * vec2(-1.0,0.0);
+    offset[4] = pixel * vec2( 0.0,0.0);
+    offset[5] = pixel * vec2( 1.0,0.0);
+
+    offset[6] = pixel * vec2(-1.0,1.0);
+    offset[7] = pixel * vec2( 0.0,1.0);
+    offset[8] = pixel * vec2( 1.0,1.0);
+
+    float lap = 0;
+
+    for (int i=0; i < 9; i++){
+      float tmp = texture2D(u_buffer1, st + offset[i]).r;
+      // lap += tmp * kernel[i] / 2.5;
+      if(tmp > 0.005) {
+        color.rgb = vec3(1);
+      }
+    }
+  }
+
+  gl_FragColor = color;
+
+#elif defined( BUFFER_1 )
+  // PONG BUFFER
+  //
+  //  Note: Just copy the content of the BUFFER0 so it can be 
+  //  read by it in the next frame
+  //
+  gl_FragColor = texture2D(u_buffer0, st);
+#else
+  // Main Buffer
+  vec3 dispColor = vec3(0, 0, 1);
+  dispColor.r = texture2D(u_depth, st).r > 0.005 ? 1 : 0;
+  dispColor.g = texture2D(u_buffer1, st).r;
+  // color.r = 1.;
+  gl_FragColor = vec4(dispColor, 1.0);
+
+
+  // gl_FragColor = color;
+#endif
+
+}
\ No newline at end of file
diff --git a/zoneb/src/main.cpp b/zoneb/src/main.cpp
index f74d4cf..6c48ca5 100644
--- a/zoneb/src/main.cpp
+++ b/zoneb/src/main.cpp
@@ -1,11 +1,22 @@
+#include "ofMain.h"
 #include "ofApp.h"
 
-int main()
-{
-	ofGLFWWindowSettings settings;
-	settings.setGLVersion(3, 2);
-	settings.setSize(1280, 720);
-	ofCreateWindow(settings);
+//========================================================================
+int main( ){
+    //    ofSetupOpenGL(1024,768,OF_WINDOW);            // <-------- setup the GL context
+    
+    // this kicks off the running of my app
+    // can be OF_WINDOW or OF_FULLSCREEN
+    // pass in width and height too:
+    
+#ifdef TARGET_OPENGLES
+    ofGLESWindowSettings settings;
+    settings.setGLESVersion(2);
+#else
+    ofGLWindowSettings settings;
+    settings.setGLVersion(3, 2);  // Programmable pipeline
+#endif
+    ofCreateWindow(settings);
+    ofRunApp(new ofApp());
 
-	ofRunApp(new ofApp());
-}
+}
\ No newline at end of file
diff --git a/zoneb/src/ofApp.cpp b/zoneb/src/ofApp.cpp
index 27235c4..cfdfc7b 100644
--- a/zoneb/src/ofApp.cpp
+++ b/zoneb/src/ofApp.cpp
@@ -3,19 +3,20 @@
 //--------------------------------------------------------------
 void ofApp::setup()
 {
+  ofDisableArbTex();
   //ofSetLogLevel(OF_LOG_VERBOSE);
 
   ofLogNotice(__FUNCTION__) << "Found " << ofxAzureKinect::Device::getInstalledCount() << " installed devices.";
 
   // Open Kinect.
-  if (this->kinectDevice.open())
+  if (kinectDevice.open())
   {
     auto kinectSettings = ofxAzureKinect::DeviceSettings();
     kinectSettings.updateIr = false;
     kinectSettings.updateColor = true;
     kinectSettings.colorResolution = K4A_COLOR_RESOLUTION_1080P;
     kinectSettings.updateVbo = false;
-    this->kinectDevice.startCameras(kinectSettings);
+    kinectDevice.startCameras(kinectSettings);
   }
 
   // Load shader.
@@ -24,23 +25,26 @@ void ofApp::setup()
   shaderSettings.shaderFiles[GL_GEOMETRY_SHADER] = "shaders/render.geom";
   shaderSettings.shaderFiles[GL_FRAGMENT_SHADER] = "shaders/render.frag";
   shaderSettings.bindDefaults = true;
-  if (this->shader.setup(shaderSettings))
+  if (shader.setup(shaderSettings))
   {
     ofLogNotice(__FUNCTION__) << "Success loading shader!";
   }
 
   // Setup vbo.
   std::vector<glm::vec3> verts(1);
-  this->vbo.setVertexData(verts.data(), verts.size(), GL_STATIC_DRAW);
+  vbo.setVertexData(verts.data(), verts.size(), GL_STATIC_DRAW);
 
-  this->pointSize = 1.0f;
-  this->useColorSpace = false;
+  pointSize = 1.0f;
+  useColorSpace = false;
+
+  boundShader.allocate(ofGetWidth(), ofGetHeight());
+  boundShader.load("shaders/bound.frag");
 }
 
 //--------------------------------------------------------------
 void ofApp::exit()
 {
-  this->kinectDevice.close();
+  kinectDevice.close();
 }
 
 //--------------------------------------------------------------
@@ -53,9 +57,20 @@ void ofApp::draw()
 {
   ofBackground(0);
 
-  if (this->kinectDevice.isStreaming())
+  if (kinectDevice.isStreaming())
   {
-    this->cam.begin();
+    auto tex = kinectDevice.getDepthTex();
+    boundShader.setUniformTexture("u_depth", tex);
+    boundShader.setUniform1i("u_init", 1);
+    boundShader.render();
+    boundShader.setUniform1i("u_init", 0);
+    for (int i = 0; i < 60; i++) {
+      boundShader.render();
+    }
+    boundShader.draw(0, 0);
+    return;
+
+    cam.begin();
     ofEnableDepthTest();
 
     ofDrawAxis(100.0f);
@@ -63,34 +78,34 @@ void ofApp::draw()
     ofPushMatrix();
     ofRotateXDeg(180);
 
-    this->shader.begin();
-    this->shader.setUniform1f("uSpriteSize", this->pointSize);
+    shader.begin();
+    shader.setUniform1f("uSpriteSize", pointSize);
 
     int numPoints;
 
-    if (this->useColorSpace)
+    if (useColorSpace)
     {
-      this->shader.setUniformTexture("uDepthTex", this->kinectDevice.getDepthInColorTex(), 1);
-      this->shader.setUniformTexture("uWorldTex", this->kinectDevice.getColorToWorldTex(), 2);
-      this->shader.setUniformTexture("uColorTex", this->kinectDevice.getColorTex(), 3);
-      this->shader.setUniform2i("uFrameSize", this->kinectDevice.getColorTex().getWidth(), this->kinectDevice.getColorTex().getHeight());
+      shader.setUniformTexture("uDepthTex", kinectDevice.getDepthInColorTex(), 1);
+      shader.setUniformTexture("uWorldTex", kinectDevice.getColorToWorldTex(), 2);
+      shader.setUniformTexture("uColorTex", kinectDevice.getColorTex(), 3);
+      shader.setUniform2i("uFrameSize", kinectDevice.getColorTex().getWidth(), kinectDevice.getColorTex().getHeight());
 
-      numPoints = this->kinectDevice.getColorTex().getWidth() * this->kinectDevice.getColorTex().getHeight();
+      numPoints = kinectDevice.getColorTex().getWidth() * kinectDevice.getColorTex().getHeight();
     }
     else
     {
-      this->shader.setUniformTexture("uDepthTex", this->kinectDevice.getDepthTex(), 1);
-      this->shader.setUniformTexture("uWorldTex", this->kinectDevice.getDepthToWorldTex(), 2);
-      this->shader.setUniformTexture("uColorTex", this->kinectDevice.getColorInDepthTex(), 3);
-      this->shader.setUniform2i("uFrameSize", this->kinectDevice.getDepthTex().getWidth(), this->kinectDevice.getDepthTex().getHeight());
+      shader.setUniformTexture("uDepthTex", kinectDevice.getDepthTex(), 1);
+      shader.setUniformTexture("uWorldTex", kinectDevice.getDepthToWorldTex(), 2);
+      shader.setUniformTexture("uColorTex", kinectDevice.getColorInDepthTex(), 3);
+      shader.setUniform2i("uFrameSize", kinectDevice.getDepthTex().getWidth(), kinectDevice.getDepthTex().getHeight());
 
-      numPoints = this->kinectDevice.getDepthTex().getWidth() * this->kinectDevice.getDepthTex().getHeight();
+      numPoints = kinectDevice.getDepthTex().getWidth() * kinectDevice.getDepthTex().getHeight();
     }
 
-    this->vbo.drawInstanced(GL_POINTS, 0, 1, numPoints);
-    this->shader.end();
+    vbo.drawInstanced(GL_POINTS, 0, 1, numPoints);
+    shader.end();
     ofPopMatrix();
-    this->cam.end();
+    cam.end();
   }
 
   ofDrawBitmapStringHighlight(ofToString(ofGetFrameRate(), 2) + " FPS", 10, 20);
@@ -101,15 +116,15 @@ void ofApp::keyPressed(int key)
 {
   if (key == OF_KEY_UP)
   {
-    this->pointSize *= 2;
+    pointSize *= 2;
   }
   else if (key == OF_KEY_DOWN)
   {
-    this->pointSize /= 2;
+    pointSize /= 2;
   }
   else if (key == ' ')
   {
-    this->useColorSpace ^= 1;
+    useColorSpace ^= 1;
   }
 }
 
diff --git a/zoneb/src/ofApp.h b/zoneb/src/ofApp.h
index ddcc4e1..600416b 100644
--- a/zoneb/src/ofApp.h
+++ b/zoneb/src/ofApp.h
@@ -3,6 +3,7 @@
 #include "ofMain.h"
 
 #include "ofxAzureKinect.h"
+#include "ofxShaderFilter.h"
 
 class ofApp 
 	: public ofBaseApp 
@@ -30,7 +31,8 @@ private:
 	ofxAzureKinect::Device kinectDevice;
 	ofEasyCam cam;
 	ofVbo vbo;
-	ofShader shader;
+	ofxShader shader;
+	ofxShaderFilter boundShader;
 
 	float pointSize;
 	bool useColorSpace;