diff --git a/examples/CommonInterfaces/CommonGUIHelperInterface.h b/examples/CommonInterfaces/CommonGUIHelperInterface.h
index 323fe103a..3e21a120e 100644
--- a/examples/CommonInterfaces/CommonGUIHelperInterface.h
+++ b/examples/CommonInterfaces/CommonGUIHelperInterface.h
@@ -43,6 +43,7 @@ struct GUIHelperInterface
 	virtual int registerGraphicsInstance(int shapeIndex, const float* position, const float* quaternion, const float* color, const float* scaling) = 0;
 	virtual void removeAllGraphicsInstances() = 0;
 	virtual void removeGraphicsInstance(int graphicsUid) {}
+	virtual void changeInstanceFlags(int instanceUid, int flags) {}
 	virtual void changeRGBAColor(int instanceUid, const double rgbaColor[4]) {}
 	virtual void changeSpecularColor(int instanceUid, const double specularColor[3]) {}
 	virtual void changeTexture(int textureUniqueId, const unsigned char* rgbTexels, int width, int height) {}
diff --git a/examples/DeformableDemo/DeformableContact.cpp b/examples/DeformableDemo/DeformableContact.cpp
index 850bcebb2..8523e0378 100644
--- a/examples/DeformableDemo/DeformableContact.cpp
+++ b/examples/DeformableDemo/DeformableContact.cpp
@@ -206,7 +206,11 @@ void DeformableContact::initPhysics()
 	int numInstances = m_guiHelper->getRenderInterface()->getTotalNumInstances();
 	double rgbaColors[3][4] = { { 1, 0, 0, 1 } , { 0, 1, 0, 1 } ,{ 0, 0, 1, 1 } };
 
-
+	for (int i = 0; i < numInstances; i++)
+	{
+		m_guiHelper->changeInstanceFlags(i, B3_INSTANCE_DOUBLE_SIDED);
+	}
+	
 }
 
 void DeformableContact::exitPhysics()
diff --git a/examples/ExampleBrowser/OpenGLGuiHelper.cpp b/examples/ExampleBrowser/OpenGLGuiHelper.cpp
index 6f4b7686f..610329425 100644
--- a/examples/ExampleBrowser/OpenGLGuiHelper.cpp
+++ b/examples/ExampleBrowser/OpenGLGuiHelper.cpp
@@ -380,6 +380,14 @@ void OpenGLGuiHelper::replaceTexture(int shapeIndex, int textureUid)
 		m_data->m_glApp->m_renderer->replaceTexture(shapeIndex, textureUid);
 	};
 }
+void OpenGLGuiHelper::changeInstanceFlags(int instanceUid, int flags)
+{
+	if (instanceUid >= 0)
+	{
+		//careful, flags/instanceUid is swapped
+		m_data->m_glApp->m_renderer->writeSingleInstanceFlagsToCPU(  flags, instanceUid);
+	}
+}
 void OpenGLGuiHelper::changeRGBAColor(int instanceUid, const double rgbaColor[4])
 {
 	if (instanceUid >= 0)
diff --git a/examples/ExampleBrowser/OpenGLGuiHelper.h b/examples/ExampleBrowser/OpenGLGuiHelper.h
index e4a43b4be..bdaa22772 100644
--- a/examples/ExampleBrowser/OpenGLGuiHelper.h
+++ b/examples/ExampleBrowser/OpenGLGuiHelper.h
@@ -27,6 +27,7 @@ struct OpenGLGuiHelper : public GUIHelperInterface
 	virtual int registerGraphicsInstance(int shapeIndex, const float* position, const float* quaternion, const float* color, const float* scaling);
 	virtual void removeAllGraphicsInstances();
 	virtual void removeGraphicsInstance(int graphicsUid);
+	virtual void changeInstanceFlags(int instanceUid, int flags);
 	virtual void changeRGBAColor(int instanceUid, const double rgbaColor[4]);
 	virtual void changeSpecularColor(int instanceUid, const double specularColor[3]);
 	virtual void changeTexture(int textureUniqueId, const unsigned char* rgbTexels, int width, int height);