diff --git a/data/slope.bullet b/data/slope.bullet
index 035cc6a6b..ef8d13408 100644
Binary files a/data/slope.bullet and b/data/slope.bullet differ
diff --git a/examples/ExampleBrowser/OpenGLExampleBrowser.cpp b/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
index 8ff0a7bf3..37a602c93 100644
--- a/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
+++ b/examples/ExampleBrowser/OpenGLExampleBrowser.cpp
@@ -266,9 +266,8 @@ void openFileDemo(const char* filename)
     s_parameterInterface->removeAllParameters();
    
 
-	CommonExampleOptions options(s_guiHelper,0);
+	CommonExampleOptions options(s_guiHelper,1);
 	options.m_fileName = filename;
-
 	char fullPath[1024];
 	sprintf(fullPath, "%s", filename);
 	b3FileUtils::toLower(fullPath);
diff --git a/examples/Importers/ImportURDFDemo/UrdfParser.cpp b/examples/Importers/ImportURDFDemo/UrdfParser.cpp
index 2e42525d5..cb3ed0816 100644
--- a/examples/Importers/ImportURDFDemo/UrdfParser.cpp
+++ b/examples/Importers/ImportURDFDemo/UrdfParser.cpp
@@ -794,8 +794,8 @@ bool UrdfParser::loadUrdf(const char* urdfText, ErrorLogger* logger, bool forceF
 							vis.m_localMaterial = **mat;
 						} else
 						{
-							logger->reportError("Cannot find material with name:");
-							logger->reportError(vis.m_materialName.c_str());
+							//logger->reportError("Cannot find material with name:");
+							//logger->reportError(vis.m_materialName.c_str());
 						}
 					}
 				}
diff --git a/examples/OpenGLWindow/stb_image_write.h b/examples/OpenGLWindow/stb_image_write.h
index 41b703388..1a51a939f 100644
--- a/examples/OpenGLWindow/stb_image_write.h
+++ b/examples/OpenGLWindow/stb_image_write.h
@@ -493,7 +493,10 @@ int stbi_write_png(char const *filename, int x, int y, int comp, const void *dat
    unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len);
    if (!png) return 0;
    f = fopen(filename, "wb");
-   if (!f) { free(png); return 0; }
+   if (!f) { 
+	   free(png); 
+	   return 0; 
+   }
    fwrite(png, 1, len, f);
    fclose(f);
    free(png);
diff --git a/examples/Tutorial/Tutorial.cpp b/examples/Tutorial/Tutorial.cpp
index b924f682a..946139fa6 100644
--- a/examples/Tutorial/Tutorial.cpp
+++ b/examples/Tutorial/Tutorial.cpp
@@ -61,6 +61,9 @@ struct LWRightBody
 			//Exponential map
 			//google for "Practical Parameterization of Rotations Using the Exponential Map", F. Sebastian Grassia
 
+			//btQuaternion q_w = [ sin(|w|*dt/2) * w/|w| , cos(|w|*dt/2)]
+			//btQuaternion q_new =  q_w * q_old;
+			
 			btVector3 axis;
 			btScalar	fAngle = m_angularVelocity.length(); 
 			//limit the angular motion
@@ -88,6 +91,7 @@ struct LWRightBody
 			predictedOrn.normalize();
 			m_worldPose.m_worldOrientation = predictedOrn;
 		}
+
 	}
 	
 
@@ -99,13 +103,9 @@ struct LWRightBody
 
 
 
-///quick demo showing the right-handed coordinate system and positive rotations around each axis
 class Tutorial : public CommonExampleInterface
 {
     CommonGraphicsApp* m_app;
-    float m_x;
-    float m_y;
-    float m_z;
     int m_tutorialIndex;
 
 	LWRightBody*	m_body;
@@ -114,14 +114,14 @@ public:
     
     Tutorial(CommonGraphicsApp* app, int tutorialIndex)
     :m_app(app),
-    m_x(0),
-    m_y(0),
-	m_z(0),
 	m_tutorialIndex(tutorialIndex)
     {
 		m_app->setUpAxis(2);
 
-
+		switch (m_tutorialIndex)
+		{
+				
+		}
 		{
 
 		 int boxId = m_app->registerCubeShape(100,100,1);
@@ -186,10 +186,6 @@ public:
     }
     virtual void	stepSimulation(float deltaTime)
     {
-        m_x+=0.01f;
-        m_y+=0.01f;
-		m_z+=0.01f;
-		//m_body->m_worldPose.m_worldPosition+= btVector3(0,0.01,0);
 		//m_body->m_linearVelocity=btVector3(0,0.1,0);
 		m_body->m_angularVelocity =btVector3(0,0.1,0);
 		m_body->integrateTransform(deltaTime);