diff --git a/examples/jpg_proxy_test/JPCJob.cpp b/examples/jpg_proxy_test/JPCJob.cpp
index 0bd12af..61c6d79 100644
--- a/examples/jpg_proxy_test/JPCJob.cpp
+++ b/examples/jpg_proxy_test/JPCJob.cpp
@@ -80,6 +80,15 @@ bool JPCJob::init()
     rootLayout->addChild(compact_grid);
     m_model->setGUILayout(rootLayout, tinia::model::gui::DESKTOP);
 
+    // 150320: Debugging/testing of new feature; "invalidate"
+    m_model->updateElement<int>("ap_splats", 20);
+    m_model->updateElement<int>("ap_overlap", 51);
+    m_model->updateElement<bool>( "ap_debugSplatCol", true );
+    m_model->updateElement<bool>( "ap_autoProxyDebugging", true );
+    m_model->updateElement<bool>( "ap_screenSpaceSized", false );
+    m_model->updateElement<bool>( "ap_splatOutline", true );
+    m_model->updateElement<bool>( "ap_useAutoProxy", true );
+
     return true;
 }
 
diff --git a/js/gui/Canvas.js b/js/gui/Canvas.js
index 67a0bea..4ed8d8c 100644
--- a/js/gui/Canvas.js
+++ b/js/gui/Canvas.js
@@ -51,8 +51,8 @@ dojo.declare("gui.Canvas", [dijit._Widget], {
         this._boundingboxKey = params.boundingboxKey;
         this._resetViewKey = params.resetViewKey;
         this._renderListURL = params.renderListURL;
-        this._width = 512;
-        this._height = 512;
+        this._width = 1024;
+        this._height = 1024;
         this._modelLib = params.modelLib;
         // The modification of fields of 'params' in this constructor is probably not necessary, because the call (there seems to be
         // only one) to the constructor uses a very short-lived automatic variable that is not used again before going out of scope.
diff --git a/js/gui/ProxyRenderer.js b/js/gui/ProxyRenderer.js
index d86cf17..3127a89 100644
--- a/js/gui/ProxyRenderer.js
+++ b/js/gui/ProxyRenderer.js
@@ -697,6 +697,13 @@ dojo.declare("gui.ProxyRenderer", null, {
                 this._lock = true;
                 this._lock2 = false;
             }
+            if ( (this.exposedModel.hasKey("ap_invalidateAllModels")) && (this.exposedModel.getElementValue("ap_invalidateAllModels")) ) {
+                // Clearing out all stored proxy models that should be invalidated, and resetting the flag to false.
+                this.exposedModel.updateElement("ap_invalidateAllModels", false);
+                for (var i=0; i<this._proxyModelCoverage.bufferRingSize; i++) {
+                    this._proxyModelCoverage.proxyModelRing[i] = new gui.ProxyModel(this.gl);
+                }
+            }
             this._setUniform1f(this._splatProgram, "splats_x", this._splats_x);
             this._setUniform1f(this._splatProgram, "splats_y", this._splats_y);
             this._setUniform1f(this._splatProgram, "splatOverlap", this._splatOverlap);
diff --git a/src/utils/ProxyDebugGUI.cpp b/src/utils/ProxyDebugGUI.cpp
index 1984236..67f585e 100644
--- a/src/utils/ProxyDebugGUI.cpp
+++ b/src/utils/ProxyDebugGUI.cpp
@@ -116,6 +116,8 @@ ProxyDebugGUI::ProxyDebugGUI( boost::shared_ptr<model::ExposedModel> model,
         model->addAnnotation("ap_splats", "Number of splats)");
         model->addElement<bool>( "ap_resetAllModels", false );
         model->addAnnotation("ap_resetAllModels", "Reset and fix proxy");
+        model->addElement<bool>( "ap_invalidateAllModels", false );
+        model->addAnnotation("ap_invalidateAllModels", "Invalidate all AP-models");
         model->addElement<bool>( "ap_useISTC", true );
         model->addAnnotation("ap_useISTC", "Use intra-splat texcoo");
         model->addElement<bool>( "ap_splatOutline", true );
@@ -269,6 +271,7 @@ void ProxyDebugGUI::resetSettingsClient()
     m_model->updateElement<int>(  "ap_overlap", 200);
     m_model->updateElement<bool>( "ap_alwaysShowMostRecent", true );
     m_model->updateElement<bool>( "ap_resetAllModels", false );
+    m_model->updateElement<bool>( "ap_invalidateAllModels", false );
     m_model->updateElement<bool>( "ap_useISTC", true );
     m_model->updateElement<bool>( "ap_splatOutline", false );
     m_model->updateElement<bool>( "ap_reloadShader", false );
@@ -449,6 +452,8 @@ tinia::model::gui::Grid *ProxyDebugGUI::getGrid()
         mainGrid->setChild(row, 0, new tinia::model::gui::Label("ap_consoleLog", false));
         mainGrid->setChild(row, 1, new tinia::model::gui::Label("ap_consoleLog", true));
         row++;
+        mainGrid->setChild(row, 0, new tinia::model::gui::Button("ap_invalidateAllModels"));
+        row++;
         mainGrid->setChild(row, 0, new tinia::model::gui::VerticalExpandingSpace());
     }
 
@@ -511,6 +516,7 @@ tinia::model::gui::Grid *ProxyDebugGUI::getCompactGrid()
     mainGrid->setChild(0, 1, new tinia::model::gui::RadioButtons("ap_compactConnectionChoices"));
     mainGrid->setChild(1, 0, new tinia::model::gui::Label("ap_compactClientChoices"));
     mainGrid->setChild(1, 1, new tinia::model::gui::RadioButtons("ap_compactClientChoices"));
+    mainGrid->setChild(2, 0, new tinia::model::gui::Button("ap_invalidateAllModels"));
 
     // Medium choices for defaults
     mediumBandwidthMediumLatency();