diff --git a/example/example.xcodeproj/project.pbxproj b/example/example.xcodeproj/project.pbxproj
index f83a8eb..f9654e4 100644
--- a/example/example.xcodeproj/project.pbxproj
+++ b/example/example.xcodeproj/project.pbxproj
@@ -20,6 +20,8 @@
 		3933D5D919BB87BD000ACA55 /* ofxSliderGroup.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3933D5CF19BB87BD000ACA55 /* ofxSliderGroup.cpp */; };
 		3933D5DA19BB87BD000ACA55 /* ofxToggle.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 3933D5D119BB87BD000ACA55 /* ofxToggle.cpp */; };
 		397EFC7C1A08E7680009286E /* ofxPiMapper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 397EFC7B1A08E7680009286E /* ofxPiMapper.cpp */; };
+		397EFC7F1A08FE720009286E /* FboSource.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 397EFC7D1A08FE720009286E /* FboSource.cpp */; };
+		397EFC821A09047C0009286E /* CustomSource.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 397EFC801A09047C0009286E /* CustomSource.cpp */; };
 		39C1243319EE9589005DF557 /* lz4.c in Sources */ = {isa = PBXBuildFile; fileRef = 39C123EA19EE9589005DF557 /* lz4.c */; };
 		39C1243419EE9589005DF557 /* Base64Encoding.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 39C1241219EE9589005DF557 /* Base64Encoding.cpp */; };
 		39C1243519EE9589005DF557 /* ByteBuffer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 39C1241319EE9589005DF557 /* ByteBuffer.cpp */; };
@@ -138,6 +140,10 @@
 		3933D5D219BB87BD000ACA55 /* ofxToggle.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ofxToggle.h; sourceTree = "<group>"; };
 		39366FD519BDA95E006E5BE6 /* ofxPiMapper.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ofxPiMapper.h; sourceTree = "<group>"; };
 		397EFC7B1A08E7680009286E /* ofxPiMapper.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ofxPiMapper.cpp; sourceTree = "<group>"; };
+		397EFC7D1A08FE720009286E /* FboSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FboSource.cpp; sourceTree = "<group>"; };
+		397EFC7E1A08FE720009286E /* FboSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FboSource.h; sourceTree = "<group>"; };
+		397EFC801A09047C0009286E /* CustomSource.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CustomSource.cpp; sourceTree = "<group>"; };
+		397EFC811A09047C0009286E /* CustomSource.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CustomSource.h; sourceTree = "<group>"; };
 		39C123E719EE9589005DF557 /* alphanum.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = alphanum.hpp; sourceTree = "<group>"; };
 		39C123EA19EE9589005DF557 /* lz4.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = lz4.c; sourceTree = "<group>"; };
 		39C123EB19EE9589005DF557 /* lz4.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = lz4.h; sourceTree = "<group>"; };
@@ -577,6 +583,8 @@
 				39C1245B19F08965005DF557 /* ImageSource.h */,
 				39C1245C19F08965005DF557 /* VideoSource.cpp */,
 				39C1245D19F08965005DF557 /* VideoSource.h */,
+				397EFC7D1A08FE720009286E /* FboSource.cpp */,
+				397EFC7E1A08FE720009286E /* FboSource.h */,
 			);
 			path = Sources;
 			sourceTree = "<group>";
@@ -696,6 +704,8 @@
 				E4B69E1D0A3A1BDC003C02F2 /* main.cpp */,
 				E4B69E1E0A3A1BDC003C02F2 /* ofApp.cpp */,
 				E4B69E1F0A3A1BDC003C02F2 /* ofApp.h */,
+				397EFC801A09047C0009286E /* CustomSource.cpp */,
+				397EFC811A09047C0009286E /* CustomSource.h */,
 			);
 			path = src;
 			sourceTree = SOURCE_ROOT;
@@ -810,6 +820,7 @@
 				39C1246A19F0AB96005DF557 /* QuadSurface.cpp in Sources */,
 				39C1247F19F187D5005DF557 /* RadioList.cpp in Sources */,
 				39C1243419EE9589005DF557 /* Base64Encoding.cpp in Sources */,
+				397EFC7F1A08FE720009286E /* FboSource.cpp in Sources */,
 				E4B69E200A3A1BDC003C02F2 /* main.cpp in Sources */,
 				39C1244719EE9589005DF557 /* RegexPathFilter.cpp in Sources */,
 				39C1247C19F187D5005DF557 /* BaseJoint.cpp in Sources */,
@@ -850,6 +861,7 @@
 				39264842192224F90008A7F5 /* tinyxmlerror.cpp in Sources */,
 				3926483B192224DA0008A7F5 /* ofxXmlSettings.cpp in Sources */,
 				39C1245119EE95DD005DF557 /* DirectoryWatcher.cpp in Sources */,
+				397EFC821A09047C0009286E /* CustomSource.cpp in Sources */,
 				39C1243819EE9589005DF557 /* ByteBufferWriter.cpp in Sources */,
 				3933D5D519BB87BD000ACA55 /* ofxGuiGroup.cpp in Sources */,
 			);
diff --git a/example/src/CustomSource.cpp b/example/src/CustomSource.cpp
new file mode 100644
index 0000000..08d0f9a
--- /dev/null
+++ b/example/src/CustomSource.cpp
@@ -0,0 +1,43 @@
+#include "CustomSource.h"
+
+// Don't do any drawing here
+void CustomSource::setup() {
+  // Give our source a decent name
+  name = "Custom FBO Source";
+  
+  // Allocate our FBO source, decide how big it should be
+  allocate(500, 500);
+  
+  // Genereate rects to be rendered into the FBO
+  int numRects = 20;  // change this to add more or less rects
+  for (int i = 0; i < numRects; i++) {
+    rects.push_back(ofRectangle(0,
+                                ofRandom(fbo->getHeight()),
+                                fbo->getWidth(),
+                                ofRandom(20)));
+    rectSpeeds.push_back((1.0f + ofRandom(5)));
+  }
+}
+
+// Don't do any drawing here
+void CustomSource::update() {
+  // Move rects
+  for (int i = 0; i < rects.size(); i++) {
+    rects[i].y += rectSpeeds[i];
+    if (rects[i].y > fbo->getHeight()) {
+      rects[i].y = -rects[i].getHeight();
+    }
+  }
+}
+
+// No need to take care of fbo.begin() and fbo.end() here.
+// All within draw() is being rendered into fbo;
+void CustomSource::draw() {
+  // Fill FBO with our rects
+  ofClear(0);
+  //ofBackground(0);
+  ofSetColor(255);
+  for (int i = 0; i < rects.size(); i++) {
+    ofRect(rects[i]);
+  }
+}
\ No newline at end of file
diff --git a/example/src/CustomSource.h b/example/src/CustomSource.h
new file mode 100644
index 0000000..5993d80
--- /dev/null
+++ b/example/src/CustomSource.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include "ofMain.h"
+#include "FboSource.h"
+
+class CustomSource : public ofx::piMapper::FboSource {
+public:
+  // These are overrides of FboSource virtual functions.
+  // FBO sources are not executing before they have been assigned to a surface.
+  void setup();
+  void update();
+  void draw(); // You don't have to care about fbo.begin() or fbo.end() here
+
+private:
+  vector<ofRectangle> rects;
+  vector<float> rectSpeeds;
+};
\ No newline at end of file
diff --git a/example/src/ofApp.cpp b/example/src/ofApp.cpp
index bacbe47..6ca4ba8 100755
--- a/example/src/ofApp.cpp
+++ b/example/src/ofApp.cpp
@@ -1,53 +1,19 @@
 #include "ofApp.h"
 
 void ofApp::setup() {
+  ofBackground(0);
   
-  // The ofxPiMapper is being set up automatically before the first
-  // ofApp setup call
-  piMapper.showInfo(); // The info layer is hidden by default, press <i> to toggle
-  
-  // Create our custom FBO
-  fbo = new ofFbo();
-  fbo->allocate(500, 500);
-  fboSource = new ofx::piMapper::BaseSource(&fbo->getTextureReference());
-  
-  // Assign the FBO's texture to one of the surfaces ofxPiMapper has created
-  piMapper.getSurfaceManager().getSurface(0)->setSource(fboSource);
-
-  // Genereate rects to be rendered into the FBO
-  int numRects = 20;  // change this to add more or less rects
-  for (int i = 0; i < numRects; i++) {
-    rects.push_back(ofRectangle(0, ofRandom(fbo->getHeight()), fbo->getWidth(),
-                                ofRandom(20)));
-    rectSpeeds.push_back((1.0f + ofRandom(5)));
-  }
-}
-
-void ofApp::update() {
+  // Add our CustomSource to list of fbo sources of the piMapper
+  // FBO sources should be added before piMapper.setup() so the
+  // piMapper is able to load the source if it is assigned to
+  // a surface in XML settings.
+  piMapper.addFboSource(customSource);
+  piMapper.setup();
   
-  // Move rects
-  for (int i = 0; i < rects.size(); i++) {
-    rects[i].y += rectSpeeds[i];
-    if (rects[i].y > fbo->getHeight()) {
-      rects[i].y = -rects[i].getHeight();
-    }
-  }
-
-  // Fill FBO with our rects
-  fbo->begin();
-  ofClear(0);
-  ofBackground(0);
-  ofSetColor(255);
-  for (int i = 0; i < rects.size(); i++) {
-    ofRect(rects[i]);
-  }
-  fbo->end();
+  // The info layer is hidden by default, press <i> to toggle
+  piMapper.showInfo();
 }
 
 void ofApp::draw() {
   piMapper.draw();
-}
-
-void ofApp::exit() {
-  delete fbo;
 }
\ No newline at end of file
diff --git a/example/src/ofApp.h b/example/src/ofApp.h
index e6cb415..008239f 100755
--- a/example/src/ofApp.h
+++ b/example/src/ofApp.h
@@ -2,21 +2,16 @@
 
 #include "ofMain.h"
 #include "ofxPiMapper.h"
-#include "BaseSource.h"
+#include "CustomSource.h"
 
 class ofApp : public ofBaseApp {
 public:
   void setup();
-  void update();
   void draw();
-  void exit();
 
   ofxPiMapper piMapper;
   
-  // Custom FBO surface variables
-  ofImage image;
-  ofFbo* fbo;
-  ofx::piMapper::BaseSource* fboSource;
-  vector<ofRectangle> rects;
-  vector<float> rectSpeeds;
+  // By using a custom source that is derived from FboSource
+  // you will be able to see the source listed in sources editor
+  CustomSource customSource;
 };
\ No newline at end of file
diff --git a/src/MediaServer/MediaServer.cpp b/src/MediaServer/MediaServer.cpp
index f8539bc..eee31cb 100644
--- a/src/MediaServer/MediaServer.cpp
+++ b/src/MediaServer/MediaServer.cpp
@@ -23,6 +23,7 @@ namespace piMapper {
 
   int MediaServer::getNumImages() { return imageWatcher.getFilePaths().size(); }
   int MediaServer::getNumVideos() { return videoWatcher.getFilePaths().size(); }
+  int MediaServer::getNumFboSources() { return fboSources.size(); }
 
   std::vector<std::string>& MediaServer::getImagePaths() {
     return imageWatcher.getFilePaths();
@@ -40,6 +41,14 @@ namespace piMapper {
     return imageNames;
   }
   
+  std::vector<std::string> MediaServer::getFboSourceNames() {
+    std::vector<std::string> fboSourceNames;
+    for (int i = 0; i < fboSources.size(); i++) {
+      fboSourceNames.push_back(fboSources[i]->getName());
+    }
+    return fboSourceNames;
+  }
+  
   std::vector<std::string>& MediaServer::getVideoPaths() {
     return videoWatcher.getFilePaths();
   }
@@ -56,14 +65,14 @@ namespace piMapper {
     return videoNames;
   }
   
-  
-  
   BaseSource* MediaServer::loadMedia(string &path, int mediaType) {
     // Chose load method depending on type
     if (mediaType == SourceType::SOURCE_TYPE_IMAGE) {
       return loadImage(path);
     } else if (mediaType == SourceType::SOURCE_TYPE_VIDEO) {
       return loadVideo(path);
+    } else if (mediaType == SourceType::SOURCE_TYPE_FBO) {
+      return loadFboSource(path);
     } else {
       std::stringstream ss;
       ss << "Can not load media of unknown type: " << mediaType;
@@ -214,16 +223,15 @@ namespace piMapper {
         unloadImage(path);
       } else if (mediaSource->getType() == SourceType::SOURCE_TYPE_VIDEO) {
         unloadVideo(path);
+      } else if (mediaSource->getType() == SourceType::SOURCE_TYPE_FBO) {
+        unloadFboSource(path);
       } else {
         // Oh my god, what to do!? Relax and exit.
         ofLogFatalError("MediaServer") << "Attempt to unload media of unknown type";
         std::exit(EXIT_FAILURE);
       }
     } else {
-      std:stringstream ss;
-      ss << "Media with path " << path << " is not loaded and thus can't be unloaded";
-      ofLogFatalError("MediaServer") << ss.str();
-      std::exit(EXIT_FAILURE);
+      ofLogNotice("MediaServer") << "Nothing to unload";
     }
   }
   
@@ -231,11 +239,15 @@ namespace piMapper {
   void MediaServer::clear() {
     typedef std::map<std::string, BaseSource*>::iterator it_type;
     for (it_type i = loadedSources.begin(); i != loadedSources.end(); i++) {
-      delete i->second;
+      // Do not delete FBO source pointers as they are (and should be) initialized elsewhere
+      if (i->second->getType() != SourceType::SOURCE_TYPE_FBO) {
+        delete i->second;
+      }
     }
     loadedSources.clear();
   }
   
+  // TODO: getLoadedSourceByPath
   BaseSource* MediaServer::getSourceByPath(std::string& mediaPath) {
     if (loadedSources.count(mediaPath)) {
       return loadedSources[mediaPath];
@@ -268,6 +280,76 @@ namespace piMapper {
     }
   }
   
+  void MediaServer::addFboSource(ofx::piMapper::FboSource &fboSource) {
+    ofLogNotice("MediaServer") << "Attempting to add FBO source with name " << fboSource.getName();
+    // FBO source has to be with unique name
+    for (int i = 0; i < fboSources.size(); i++) {
+      if (fboSources[i]->getName() == fboSource.getName()) {
+        ofLogWarning("MediaServer") << "Attempt to add FBO source with duplicate name";
+        ofExit(EXIT_FAILURE); // Here we definitely need to fail to avoid confusion
+      }
+    }
+    ofLogNotice("MediaServer") << "Source new, adding";
+    fboSources.push_back(&fboSource);
+  } // addFboSource
+  
+  BaseSource* MediaServer::loadFboSource(std::string &fboSourceName) {
+    ofLogNotice("MediaServer") << "Attempting to load FBO source with name " << fboSourceName;
+    // Search for FBO source name in our storage
+    FboSource* source = NULL;
+    for (int i = 0; i < fboSources.size(); i++) {
+      if (fboSources[i]->getName() == fboSourceName) {
+        source = fboSources[i];
+        break;
+      }
+    }
+    // Panic if not in storage
+    if (source == NULL) {
+      ofLogError("MediaServer") << "Attempt to load non existing FBO source: " << fboSourceName;
+      ofExit(EXIT_FAILURE);
+    }
+    // Check if it is loaded/activated
+    if (loadedSources.count(fboSourceName)) {
+      // Is loaded, increase reference count and return existing
+      loadedSources[fboSourceName]->referenceCount++;
+      ofLogNotice("MediaServer") << "Current " << fboSourceName << "reference count: " << loadedSources[fboSourceName]->referenceCount;
+      return loadedSources[fboSourceName];
+    }
+    // else
+    // Not loaded, add to loaded sources and activate
+    // source var should be set by now
+    source->addAppListeners();
+    source->referenceCount = 1;
+    ofLogNotice("MediaServer") << "Current " << fboSourceName << " reference count: " << source->referenceCount;
+    loadedSources[fboSourceName] = source;
+    return loadedSources[fboSourceName];
+  } // loadFboSource
+  
+  void MediaServer::unloadFboSource(std::string &fboSourceName) {
+    ofLogNotice("MediaServer") << "Attempt to unload FBO source " << fboSourceName;
+    // Check if loaded at all
+    if (!loadedSources.count(fboSourceName)) {
+      ofLogWarning("MediaServer") << "FBO source not loaded";
+      return;
+    }
+    // TODO: remove static cast, make the sources handle reference counting,
+    // enabling and disabling by themselves
+    FboSource* source = static_cast<FboSource*>(loadedSources[fboSourceName]);
+    // else decrease reference count
+    source->referenceCount--;
+    ofLogNotice("MediaServer") << "Current " << fboSourceName << "reference count: " << loadedSources[fboSourceName]->referenceCount;
+    // If no references left, disable
+    if (source->referenceCount <= 0) {
+      ofLogNotice("MediaServer") << fboSourceName << " reference count <= 0, removing from loaded sources";
+      source->referenceCount = 0;
+      source->removeAppListeners();
+      std::map<std::string, BaseSource*>::iterator it = loadedSources.find(fboSourceName);
+      loadedSources.erase(it);
+      ofLogNotice("MediaServer") << "Source count after FBO source removal: " << loadedSources.size() << endl;
+      ofNotifyEvent(onFboSourceUnloaded, fboSourceName, this);
+    }
+  } // unloadFboSource
+  
   void MediaServer::handleImageAdded(string& path) {
     ofNotifyEvent(onImageAdded, path, this);
   }
diff --git a/src/MediaServer/MediaServer.h b/src/MediaServer/MediaServer.h
index 3e700e1..f49f0ea 100644
--- a/src/MediaServer/MediaServer.h
+++ b/src/MediaServer/MediaServer.h
@@ -6,6 +6,9 @@
 //
 //
 
+// TODO: move reference counting, enabling and disabling of sources
+//       to source classes themselves
+
 #pragma once
 
 #include "ofMain.h"
@@ -13,6 +16,7 @@
 #include "BaseSource.h"
 #include "ImageSource.h"
 #include "VideoSource.h"
+#include "FboSource.h"
 #include "SourceType.h"
 
 #define DEFAULT_IMAGES_DIR "sources/images/"
@@ -28,10 +32,12 @@ class MediaServer {
 
   int getNumVideos();
   int getNumImages();
+  int getNumFboSources(); // new
   std::vector<std::string>& getVideoPaths();
   std::vector<std::string>  getVideoNames();
   std::vector<std::string>& getImagePaths();
   std::vector<std::string>  getImageNames();
+  std::vector<std::string>  getFboSourceNames(); // new
   
   BaseSource* loadMedia(string& path, int mediaType);
   BaseSource* loadImage(string& path);
@@ -45,15 +51,25 @@ class MediaServer {
   std::string getDefaultVideoDir();
   std::string getDefaultMediaDir(int sourceType);
   
-  // Custom events
-  ofEvent<string> onImageAdded;
-  ofEvent<string> onImageRemoved;
-  ofEvent<string> onVideoAdded;
-  ofEvent<string> onVideoRemoved;
-  ofEvent<string> onImageLoaded;
-  ofEvent<string> onImageUnloaded;
-  ofEvent<string> onVideoLoaded;
-  ofEvent<string> onVideoUnloaded;
+  // Do things with FBO sources
+  void addFboSource(FboSource& fboSource); // could be called also as register FBO source
+  BaseSource* loadFboSource(std::string& fboSourceName);
+  void unloadFboSource(std::string& fboSourceName);
+  
+  // Custom events, add/remove
+  ofEvent<std::string> onImageAdded;
+  ofEvent<std::string> onImageRemoved;
+  ofEvent<std::string> onVideoAdded;
+  ofEvent<std::string> onVideoRemoved;
+  ofEvent<std::string> onFboSourceAdded;
+  ofEvent<std::string> onFboSourceRemoved;
+  // load/unload
+  ofEvent<std::string> onImageLoaded;
+  ofEvent<std::string> onImageUnloaded;
+  ofEvent<std::string> onVideoLoaded;
+  ofEvent<std::string> onVideoUnloaded;
+  ofEvent<std::string> onFboSourceLoaded;
+  ofEvent<std::string> onFboSourceUnloaded;
 
  private:
   // Directory Watchers
@@ -86,6 +102,9 @@ class MediaServer {
   
   // Remove event listeners to image and video watcher events
   void removeWatcherListeners();
+  
+  // FBO source storage before they go to loadedSources
+  std::vector<FboSource*> fboSources; // FBO source storage
 };
 } // namespace piMapper
 } // namespace ofx
diff --git a/src/Sources/BaseSource.h b/src/Sources/BaseSource.h
index fb5e567..5dbc894 100644
--- a/src/Sources/BaseSource.h
+++ b/src/Sources/BaseSource.h
@@ -18,6 +18,9 @@ namespace ofx {
       int getType();
       std::string& getPath();
       virtual void clear() {};
+      
+      // TODO: add virtual increaseReferenceCount and decreaseReferenceCount methods
+      // and make the variable protected
       int referenceCount;
       
     private:
diff --git a/src/Sources/FboSource.cpp b/src/Sources/FboSource.cpp
new file mode 100644
index 0000000..f64236b
--- /dev/null
+++ b/src/Sources/FboSource.cpp
@@ -0,0 +1,81 @@
+#include "FboSource.h"
+
+namespace ofx {
+  namespace piMapper {
+    FboSource::FboSource() : fbo(NULL) {
+      name = PIMAPPER_DEF_FBO_SOURCE_NAME;
+      loadable = false;
+      loaded = false;
+      type = SourceType::SOURCE_TYPE_FBO;
+      ofAddListener(ofEvents().setup, this, &FboSource::onAppSetup, OF_EVENT_ORDER_BEFORE_APP);
+    }
+    
+    FboSource::~FboSource() {
+      removeAppListeners();
+      clear();
+    }
+    
+    void FboSource::addAppListeners() {
+      ofLogNotice("FboSource") << "Adding app listeners";
+      ofAddListener(ofEvents().update, this, &FboSource::onAppUpdate, OF_EVENT_ORDER_BEFORE_APP);
+      ofAddListener(ofEvents().draw, this, &FboSource::onAppDraw, OF_EVENT_ORDER_BEFORE_APP);
+      ofAddListener(ofEvents().exit, this, &FboSource::onAppExit, OF_EVENT_ORDER_AFTER_APP);
+    }
+    
+    void FboSource::removeAppListeners() {
+      ofLogNotice("FboSource") << "Removing app listeners";
+      ofRemoveListener(ofEvents().update, this, &FboSource::onAppUpdate, OF_EVENT_ORDER_BEFORE_APP);
+      ofRemoveListener(ofEvents().draw, this, &FboSource::onAppDraw, OF_EVENT_ORDER_BEFORE_APP);
+      ofRemoveListener(ofEvents().exit, this, &FboSource::onAppExit, OF_EVENT_ORDER_AFTER_APP);
+    }
+    
+    void FboSource::onAppSetup(ofEventArgs &args) {
+      ofRemoveListener(ofEvents().setup, this, &FboSource::onAppSetup, OF_EVENT_ORDER_BEFORE_APP);
+      setup();
+    }
+    
+    void FboSource::onAppUpdate(ofEventArgs &args) {
+      if (fbo == NULL || !fbo->isAllocated()) {
+        ofLogWarning("FboSource") << "FBO not allocated";
+        return;
+      }
+      update();
+    }
+    
+    void FboSource::onAppDraw(ofEventArgs &args) {
+      if (fbo == NULL || !fbo->isAllocated()) {
+        ofLogWarning("FboSource") << "FBO not allocated";
+        return;
+      }
+      fbo->begin();
+      draw();
+      fbo->end();
+    }
+    
+    void FboSource::onAppExit(ofEventArgs &args) {
+      exit();
+    }
+    
+    void FboSource::allocate(int width, int height) {
+      clear();
+      fbo = new ofFbo();
+      fbo->allocate(width, height);
+      
+      // Clear FBO
+      fbo->begin();
+      ofClear(0);
+      fbo->end();
+      
+      texture = &(fbo->getTextureReference());
+    }
+    
+    void FboSource::clear() {
+      texture = NULL;
+      if (fbo != NULL) {
+        delete fbo;
+        fbo = NULL;
+      }
+    }
+    
+  } // namespace piMapper
+} // namespace ofx
\ No newline at end of file
diff --git a/src/Sources/FboSource.h b/src/Sources/FboSource.h
new file mode 100644
index 0000000..2a27ded
--- /dev/null
+++ b/src/Sources/FboSource.h
@@ -0,0 +1,49 @@
+/*
+Use this as base class for your generative sources:
+ 
+class YourGenerativeSource : public FboSource {
+  // Your code here
+}
+*/
+#pragma once
+
+#include "ofMain.h"
+#include "BaseSource.h"
+
+#define PIMAPPER_DEF_FBO_SOURCE_NAME "FBO Source"
+
+namespace ofx {
+  namespace piMapper {
+    class FboSource : public BaseSource {
+    public:
+      FboSource();
+      ~FboSource();
+      
+      // Add/remove calls to update and draw
+      // App listeners are added once the source is assigned to at least one surface
+      // App listeners are removed once the source is not assigned anywhere
+      void addAppListeners();
+      void removeAppListeners();
+      
+      // These are called on app events
+      void onAppSetup(ofEventArgs& args);
+      void onAppUpdate(ofEventArgs& args);
+      void onAppDraw(ofEventArgs& args);
+      void onAppExit(ofEventArgs& args);
+      
+      // Override these in your custom FBO source
+      virtual void setup() {}; // Don't do any drawing here
+      virtual void update() {}; // Don't do any drawing here
+      // You don't need to take care of fbo.begin() and fbo.end() here;
+      virtual void draw() {}; // But this is the only place where you shoud do drawing
+      virtual void exit() {};
+      
+      // Use these to set up FBo itself
+      void allocate(int width, int height);
+      void clear(); // The only method from BaseSource to be overriden
+      
+    protected:
+      ofFbo* fbo;
+    };
+  } // namespace piMapper
+} // namespace ofx
\ No newline at end of file
diff --git a/src/Sources/SourceType.h b/src/Sources/SourceType.h
index 515e2e4..ad4ebe5 100644
--- a/src/Sources/SourceType.h
+++ b/src/Sources/SourceType.h
@@ -5,12 +5,13 @@
 #define SOURCE_TYPE_NAME_NONE "none"
 #define SOURCE_TYPE_NAME_IMAGE "image"
 #define SOURCE_TYPE_NAME_VIDEO "video"
+#define SOURCE_TYPE_NAME_FBO "fbo"
 
 namespace ofx {
   namespace piMapper {
     class SourceType {
     public:
-      enum { SOURCE_TYPE_NONE, SOURCE_TYPE_IMAGE, SOURCE_TYPE_VIDEO };
+      enum { SOURCE_TYPE_NONE, SOURCE_TYPE_IMAGE, SOURCE_TYPE_VIDEO, SOURCE_TYPE_FBO };
       
       static std::string GetSourceTypeName(int sourceTypeEnum) {
         if (sourceTypeEnum == SOURCE_TYPE_IMAGE) {
@@ -19,6 +20,8 @@ namespace ofx {
           return SOURCE_TYPE_NAME_VIDEO;
         } else if (sourceTypeEnum == SOURCE_TYPE_NONE) {
           return SOURCE_TYPE_NAME_NONE;
+        } else if (sourceTypeEnum == SOURCE_TYPE_FBO) {
+          return SOURCE_TYPE_NAME_FBO;
         } else {
           std::stringstream ss;
           ss << "Invalid source type: " << sourceTypeEnum;
@@ -34,6 +37,8 @@ namespace ofx {
           return SOURCE_TYPE_VIDEO;
         } else if (sourceTypeName == SOURCE_TYPE_NAME_NONE) {
           return SOURCE_TYPE_NONE;
+        } else if (sourceTypeName == SOURCE_TYPE_NAME_FBO) {
+          return SOURCE_TYPE_FBO;
         } else {
           std::stringstream ss;
           ss << "Invalid source type name: " << sourceTypeName;
diff --git a/src/Surfaces/SurfaceManager.cpp b/src/Surfaces/SurfaceManager.cpp
index c2c8c68..929fd1f 100644
--- a/src/Surfaces/SurfaceManager.cpp
+++ b/src/Surfaces/SurfaceManager.cpp
@@ -225,13 +225,18 @@ void SurfaceManager::loadXmlSettings(string fileName) {
     if (sourceName != "" && sourceName != "none" && sourceType != "") {
       // Load source depending on type
       int typeEnum = SourceType::GetSourceTypeEnum(sourceType);
-      // Construct full path
-      string dir = mediaServer->getDefaultMediaDir(typeEnum);
-      std::stringstream pathss;
-      pathss << ofToDataPath(dir, true) << sourceName;
-      string sourcePath = pathss.str();
-      // Load media by using full path
-      source = mediaServer->loadMedia(sourcePath, typeEnum);
+      if (typeEnum == SourceType::SOURCE_TYPE_FBO) {
+        // Load FBO source using sourceName
+        source = mediaServer->loadMedia(sourceName, typeEnum);
+      } else {
+        // Construct full path
+        string dir = mediaServer->getDefaultMediaDir(typeEnum);
+        std::stringstream pathss;
+        pathss << ofToDataPath(dir, true) << sourceName;
+        string sourcePath = pathss.str();
+        // Load media by using full path
+        source = mediaServer->loadMedia(sourcePath, typeEnum);
+      }
     }
     xmlSettings.popTag();  // source
     xmlSettings.pushTag("vertices");
diff --git a/src/UserInterface/SourcesEditor.cpp b/src/UserInterface/SourcesEditor.cpp
index d106d67..622fef7 100644
--- a/src/UserInterface/SourcesEditor.cpp
+++ b/src/UserInterface/SourcesEditor.cpp
@@ -11,6 +11,12 @@ namespace piMapper {
     addMediaServerListeners();
   }
   
+  void SourcesEditor::init() {
+    mediaServer = NULL; // Pointers to NULL pointer so we can check later
+    isMediaServerExternal = false;
+    registerAppEvents();
+  }
+  
   SourcesEditor::SourcesEditor(MediaServer* externalMediaServer) {
     init();
     // Assign external MediaServer instance pointer
@@ -23,6 +29,7 @@ namespace piMapper {
     unregisterAppEvents();
     delete imageSelector;
     delete videoSelector;
+    delete fboSelector;
     removeMediaServerListeners();
     clearMediaServer();
   }
@@ -38,10 +45,12 @@ namespace piMapper {
   void SourcesEditor::setup(ofEventArgs& args) {
     imageSelector = new RadioList();
     videoSelector = new RadioList();
+    fboSelector = new RadioList();
     
     // Get media count
     int numImages = mediaServer->getNumImages();
     int numVideos = mediaServer->getNumVideos();
+    int numFbos = mediaServer->getNumFboSources();
     
     // Depending on media count, decide what to load and initialize
     if (numImages) {
@@ -55,16 +64,25 @@ namespace piMapper {
       videoSelector->setup("Videos", videoNames, mediaServer->getVideoPaths());
       ofAddListener(videoSelector->onRadioSelected, this, &SourcesEditor::handleVideoSelected);
     }
+    if (numFbos) {
+      std::vector<std::string> fboNames = mediaServer->getFboSourceNames();
+      fboSelector->setup("FBOs", fboNames, fboNames);
+      ofAddListener(fboSelector->onRadioSelected, this, &SourcesEditor::handleFboSelected);
+    }
     
+    // Align menus
+    int menuPosX = 20;
+    int distX = 230;
     if (numImages) {
-      imageSelector->setPosition(20, 20);
-      if (numVideos) {
-        videoSelector->setPosition(250, 20);
-      }
-    } else {
-      if (numVideos) {
-        videoSelector->setPosition(20, 20);
-      }
+      imageSelector->setPosition(menuPosX, 20);
+      menuPosX += distX;
+    }
+    if (numVideos) {
+      videoSelector->setPosition(menuPosX, 20);
+      menuPosX += distX;
+    }
+    if (numFbos) {
+      fboSelector->setPosition(menuPosX, 20);
     }
     
   }
@@ -81,6 +99,9 @@ namespace piMapper {
     if (videoSelector->size()) {
       videoSelector->draw();
     }
+    if (fboSelector->size()) {
+      fboSelector->draw();
+    }
     
   }
 
@@ -91,6 +112,9 @@ namespace piMapper {
     if (videoSelector->size()) {
       videoSelector->disable();
     }
+    if (fboSelector->size()) {
+      fboSelector->disable();
+    }
   }
 
   void SourcesEditor::enable() {
@@ -105,6 +129,9 @@ namespace piMapper {
     if (videoSelector->size()) {
       videoSelector->enable();
     }
+    if (fboSelector->size()) {
+      fboSelector->enable();
+    }
     BaseSource* source = surfaceManager->getSelectedSurface()->getSource();
     selectSourceRadioButton(source->getPath());
   }
@@ -137,18 +164,25 @@ namespace piMapper {
       if (videoSelector->size()) {
         videoSelector->unselectAll();
       }
+      if (fboSelector->size()) {
+        fboSelector->unselectAll();
+      }
       return;
     } else {
       // Check image selector first
       bool imageRadioSelected = false;
       bool videoRadioSelected = false;
+      bool fboRadioSelected = false;
       if (imageSelector->size()) {
         imageRadioSelected = imageSelector->selectItemByValue(sourcePath);
       }
       if (videoSelector->size()) {
         videoRadioSelected = videoSelector->selectItemByValue(sourcePath);
       }
-      if (imageRadioSelected || videoRadioSelected) {
+      if (fboSelector->size()) {
+        fboRadioSelected = fboSelector->selectItemByValue(sourcePath);
+      }
+      if (imageRadioSelected || videoRadioSelected || fboRadioSelected) {
         return;
       }
       // Log warning if we are still here
@@ -156,12 +190,6 @@ namespace piMapper {
     }
   }
   
-  void SourcesEditor::init() {
-    mediaServer = NULL; // Pointers to NULL pointer so we can check later
-    isMediaServerExternal = false;
-    registerAppEvents();
-  }
-  
   void SourcesEditor::addMediaServerListeners() {
     // Check if the media server is valid
     if (mediaServer == NULL) {
@@ -176,6 +204,11 @@ namespace piMapper {
     ofAddListener(mediaServer->onImageLoaded, this, &SourcesEditor::handleImageLoaded);
     ofAddListener(mediaServer->onImageUnloaded, this, &SourcesEditor::handleImageUnloaded);
     
+    ofAddListener(mediaServer->onFboSourceAdded, this, &SourcesEditor::handleFboSourceAdded);
+    ofAddListener(mediaServer->onFboSourceRemoved, this, &SourcesEditor::handleFboSourceRemoved);
+    ofAddListener(mediaServer->onFboSourceLoaded, this, &SourcesEditor::handleFboSourceLoaded);
+    ofAddListener(mediaServer->onFboSourceUnloaded, this, &SourcesEditor::handleFboSourceUnloaded);
+    
   }
   
   void SourcesEditor::removeMediaServerListeners() {
@@ -191,42 +224,81 @@ namespace piMapper {
     ofRemoveListener(mediaServer->onVideoRemoved, this, &SourcesEditor::handleVideoRemoved);
     ofRemoveListener(mediaServer->onImageLoaded, this, &SourcesEditor::handleImageLoaded);
     ofRemoveListener(mediaServer->onImageUnloaded, this, &SourcesEditor::handleImageUnloaded);
+    ofRemoveListener(mediaServer->onFboSourceAdded, this, &SourcesEditor::handleFboSourceAdded);
+    ofRemoveListener(mediaServer->onFboSourceRemoved, this, &SourcesEditor::handleFboSourceRemoved);
+    ofRemoveListener(mediaServer->onFboSourceLoaded, this, &SourcesEditor::handleFboSourceLoaded);
+    ofRemoveListener(mediaServer->onFboSourceUnloaded, this, &SourcesEditor::handleFboSourceUnloaded);
   }
 
   void SourcesEditor::handleImageSelected(string& imagePath) {
-    // Unselect video item if any selected
+    // Unselect selected items
     videoSelector->unselectAll();
+    fboSelector->unselectAll();
+    
     BaseSurface* surface = surfaceManager->getSelectedSurface();
     if (surface == NULL) {
-      ofLogNotice("SourcesEditor") << "No surface selected";
+      ofLogWarning("SourcesEditor") << "No surface selected";
       return;
     }
+    
     // Unload old media
     BaseSource* source = surface->getSource();
     if (source->isLoadable()) {
       mediaServer->unloadMedia(source->getPath());
+    } else {
+      mediaServer->unloadMedia(source->getName());
     }
+
     // Load new image
     surface->setSource(mediaServer->loadImage(imagePath));
   }
   
   void SourcesEditor::handleVideoSelected(string& videoPath) {
-    // Unselect image item if any selected
+    // Unselect any selected items
+    fboSelector->unselectAll();
     imageSelector->unselectAll();
+    
     BaseSurface* surface = surfaceManager->getSelectedSurface();
     if (surface == NULL) {
-      ofLogNotice("SourcesEditor") << "No surface selected";
+      ofLogWarning("SourcesEditor") << "No surface selected";
       return;
     }
+    
     // Unload old media
     BaseSource* source = surface->getSource();
     if (source->isLoadable()) {
       mediaServer->unloadMedia(source->getPath());
+    } else {
+      mediaServer->unloadMedia(source->getName());
     }
+    
     // Load new video
     surface->setSource(mediaServer->loadVideo(videoPath));
   }
   
+  void SourcesEditor::handleFboSelected(string &fboName) {
+    videoSelector->unselectAll();
+    imageSelector->unselectAll();
+    
+    // Get selected surface
+    BaseSurface* surface = surfaceManager->getSelectedSurface();
+    if (surface == NULL) {
+      ofLogWarning("SourcesEditor") << "No surface selected";
+      return;
+    }
+    
+    // Unload old media
+    BaseSource* source = surface->getSource();
+    if (source->isLoadable()) {
+      mediaServer->unloadMedia(source->getPath());
+    } else {
+      mediaServer->unloadMedia(source->getName());
+    }
+    
+    // Load new FBO
+    surface->setSource(mediaServer->loadFboSource(fboName));
+  }
+  
   void SourcesEditor::clearMediaServer() {
     // If mediaServer is local, clear it
     if (!isMediaServerExternal) {
@@ -238,34 +310,16 @@ namespace piMapper {
     }
   }
   
-  void SourcesEditor::handleImageAdded(string& path) {
-    cout << "image added: " << path << endl;
-  }
-  
-  void SourcesEditor::handleImageRemoved(string& path) {
-    cout << "image removed: " << path << endl;
-  }
-  
-  void SourcesEditor::handleVideoAdded(string& path) {
-    cout << "video added: " << path << endl;
-  }
-  
-  void SourcesEditor::handleVideoRemoved(string& path) {
-    cout << "video removed: " << path << endl;
-  }
-  
-  void SourcesEditor::handleImageLoaded(string& path) {
-    cout << "Image loaded: " << path << endl;
-    
-    // Test image unload
-    // mediaServer->unloadImage(path);
-    
-    //BaseSource* source = mediaServer->getSourceByPath(path);
-    //surfaceManager->getSelectedSurface()->setSource(source);
-  }
+  void SourcesEditor::handleImageAdded(std::string& path) {}
+  void SourcesEditor::handleImageRemoved(std::string& path) {}
+  void SourcesEditor::handleVideoAdded(std::string& path) {}
+  void SourcesEditor::handleVideoRemoved(std::string& path) {}
+  void SourcesEditor::handleImageLoaded(std::string& path) {}
+  void SourcesEditor::handleImageUnloaded(std::string& path) {}
+  void SourcesEditor::handleFboSourceAdded(std::string& name) {}
+  void SourcesEditor::handleFboSourceRemoved(std::string& name) {}
+  void SourcesEditor::handleFboSourceLoaded(std::string& name) {}
+  void SourcesEditor::handleFboSourceUnloaded(std::string& name) {}
   
-  void SourcesEditor::handleImageUnloaded(string& path) {
-    cout << "Image unloaded: " << path << endl;
-  }
 }
 }
\ No newline at end of file
diff --git a/src/UserInterface/SourcesEditor.h b/src/UserInterface/SourcesEditor.h
index e0edecc..324d038 100644
--- a/src/UserInterface/SourcesEditor.h
+++ b/src/UserInterface/SourcesEditor.h
@@ -41,6 +41,7 @@ class SourcesEditor {
   SurfaceManager* surfaceManager;
   RadioList* imageSelector;
   RadioList* videoSelector;
+  RadioList* fboSelector;
   
   // Is the media server pointer local or from somewhere else?
   // We use this to determine if we are allowed to clear media server locally.
@@ -56,18 +57,24 @@ class SourcesEditor {
   // Handles GUI event, whenever someone has clicked on a radio button
   void handleImageSelected(string& imagePath);
   void handleVideoSelected(string& videoPath);
+  void handleFboSelected(string& fboName);
   
   // Careful clearing of the media server,
   // clears only if the media server has been initialized locally
   void clearMediaServer();
   
   // MediaServer event handlers
-  void handleImageAdded(string& path);
-  void handleImageRemoved(string& path);
-  void handleVideoAdded(string& path);
-  void handleVideoRemoved(string& path);
-  void handleImageLoaded(string& path);
-  void handleImageUnloaded(string& path);
+  void handleImageAdded(std::string& path);
+  void handleImageRemoved(std::string& path);
+  void handleVideoAdded(std::string& path);
+  void handleVideoRemoved(std::string& path);
+  void handleImageLoaded(std::string& path);
+  void handleImageUnloaded(std::string& path);
+  void handleFboSourceAdded(std::string& name);
+  void handleFboSourceRemoved(std::string& name);
+  void handleFboSourceLoaded(std::string& name);
+  void handleFboSourceUnloaded(std::string& name);
+  
 };
 }
 }
\ No newline at end of file
diff --git a/src/ofxPiMapper.cpp b/src/ofxPiMapper.cpp
index 1e8bce9..546002d 100644
--- a/src/ofxPiMapper.cpp
+++ b/src/ofxPiMapper.cpp
@@ -3,16 +3,14 @@
 ofxPiMapper::ofxPiMapper():
 bShowInfo(false),
 isSetUp(false){
-  ofAddListener(ofEvents().setup, this, &ofxPiMapper::setup, OF_EVENT_ORDER_BEFORE_APP);
   ofAddListener(ofEvents().keyPressed, this, &ofxPiMapper::keyPressed);
 }
 
 ofxPiMapper::~ofxPiMapper() {
-  ofRemoveListener(ofEvents().setup, this, &ofxPiMapper::setup, OF_EVENT_ORDER_BEFORE_APP);
   ofRemoveListener(ofEvents().keyPressed, this, &ofxPiMapper::keyPressed);
 }
 
-void ofxPiMapper::setup(ofEventArgs& args) {
+void ofxPiMapper::setup() {
   ofLogNotice("ofxPiMapper") << "Setting up...";
   
   // Assign media server to other pi mapper components
@@ -105,6 +103,10 @@ void ofxPiMapper::keyPressed(ofKeyEventArgs &args) {
   }
 } // keyPressed
 
+void ofxPiMapper::addFboSource(ofx::piMapper::FboSource &fboSource) {
+  mediaServer.addFboSource(fboSource);
+} // addFboSource
+
 void ofxPiMapper::addTriangleSurface() {
   int surfaceType = ofx::piMapper::SurfaceType::TRIANGLE_SURFACE;
   
diff --git a/src/ofxPiMapper.h b/src/ofxPiMapper.h
index ff93ab7..0a7db3d 100644
--- a/src/ofxPiMapper.h
+++ b/src/ofxPiMapper.h
@@ -4,6 +4,7 @@
 #include "SurfaceManager.h"
 #include "SurfaceManagerGui.h"
 #include "MediaServer.h"
+#include "FboSource.h"
 
 #define PIMAPPER_DEF_SURFACES_XML_FILE "defaultSurfaces.xml"
 #define PIMAPPER_USER_SURFACES_XML_FILE "surfaces.xml"
@@ -13,11 +14,14 @@ public:
   ofxPiMapper();
   ~ofxPiMapper();
   
-  void setup(ofEventArgs& args);
+  void setup();
   void draw(); // Called manually to make custom layering possible
   void keyPressed(ofKeyEventArgs& args);
   
-  // TODO: Move these methods to SurfaceManager
+  // Use this to add custom FBO source
+  void addFboSource(ofx::piMapper::FboSource& fboSource);
+  
+  // TODO: Copy/move these methods to SurfaceManager
   void addTriangleSurface();
   void addQuadSurface();