diff --git a/assignments/DirectedStudy/Tobias/Scenes/OlympicRings.x3d b/assignments/DirectedStudy/Tobias/Scenes/OlympicRings.x3d
index d664b9550456ae3f557a15593b809b59b2656b3e..ff9d4577f9407e089a1306b71e623913c1d487f3 100644
--- a/assignments/DirectedStudy/Tobias/Scenes/OlympicRings.x3d
+++ b/assignments/DirectedStudy/Tobias/Scenes/OlympicRings.x3d
@@ -15,13 +15,15 @@
     <meta content='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit' name='generator'/>
   </head>
   <Scene>
-    <Viewpoint position='0 0 45' description="Infront of the Rings"/>
+    <NavigationInfo/>
+    <PointLight DEF='PointLight' location='0 0 45'/>
+    <Viewpoint description='Infront of the Rings' position='0 0 45'/>
     <Background skyColor='0.2 0.2 0.2'/>
     <Transform DEF='AllRings' translation='0 2 0'>
       <Transform rotation='1 0 0 1.6' translation='-11 2.5 0.1'>
         <Shape>
-          <Extrusion DEF='RingExtrusion' convex='true' crossSection='5 0 4.924039 0.868241 4.698463 1.710101 4.330127 2.5 3.830222 3.213938 3.213938 3.830222 2.5 4.330127 1.710101 4.698463 0.868241 4.924039 0 5 -0.868241 4.924039 -1.710101 4.698463 -2.5 4.330127 -3.213938 3.830222 -3.830222 3.213938 -4.330127 2.5 -4.698463 1.710101 -4.924039 0.868241 -5 0 -4.924039 -0.868241 -4.698463 -1.710101 -4.330127 -2.5 -3.830222 -3.213938 -3.213938 -3.830222 -2.5 -4.330127 -1.710101 -4.698463 -0.868241 -4.924039 -0 -5 0.868241 -4.924039 1.710101 -4.698463 2.5 -4.330127 3.213938 -3.830222 3.830222 -3.213938 4.330127 -2.5 4.698463 -1.710101 4.924039 -0.868241 5 -0 4.5 0 4.431635 0.781417 4.228617 1.539091 3.897114 2.25 3.4472 2.892544 2.892544 3.4472 2.25 3.897114 1.539091 4.228617 0.781417 4.431635 0 4.5 -0.781417 4.431635 -1.539091 4.228617 -2.25 3.897114 -2.892544 3.4472 -3.4472 2.892544 -3.897114 2.25 -4.228617 1.539091 -4.431635 0.781417 -4.5 0 -4.431635 -0.781417 -4.228617 -1.539091 -3.897114 -2.25 -3.4472 -2.892544 -2.892544 -3.4472 -2.25 -3.897114 -1.539091 -4.228617 -0.781417 -4.431635 -0 -4.5 0.781417 -4.431635 1.539091 -4.228617 2.25 -3.897114 2.892544 -3.4472 3.4472 -2.892544 3.897114 -2.25 4.228617 -1.539091 4.431635 -0.781417 4.5 -0' solid='false'>
-            <!-- spine is open, crossSection is open -->
+          <Extrusion DEF='RingExtrusion' convex='false' crossSection='4.924039 0.868241 4.698463 1.710101 4.330127 2.5 3.830222 3.213938 3.213938 3.830222 2.5 4.330127 1.710101 4.698463 0.868241 4.924039 0 5 -0.868241 4.924039 -1.710101 4.698463 -2.5 4.330127 -3.213938 3.830222 -3.830222 3.213938 -4.330127 2.5 -4.698463 1.710101 -4.924039 0.868241 -5 0 -4.924039 -0.868241 -4.698463 -1.710101 -4.330127 -2.5 -3.830222 -3.213938 -3.213938 -3.830222 -2.5 -4.330127 -1.710101 -4.698463 -0.868241 -4.924039 -0 -5 0.868241 -4.924039 1.710101 -4.698463 2.5 -4.330127 3.213938 -3.830222 3.830222 -3.213938 4.330127 -2.5 4.698463 -1.710101 4.924039 -0.868241 5 -0 4.5 0 4.431635 -0.781417 4.228617 -1.539091 3.897114 -2.25 3.4472 -2.892544 2.892544 -3.4472 2.25 -3.897114 1.539091 -4.228617 0.781417 -4.431635 -0 -4.5 -0.781417 -4.431635 -1.539091 -4.228617 -2.25 -3.897114 -2.892544 -3.4472 -3.4472 -2.892544 -3.897114 -2.25 -4.228617 -1.539091 -4.431635 -0.781417 -4.5 0 -4.431635 0.781417 -4.228617 1.539091 -3.897114 2.25 -3.4472 2.892544 -2.892544 3.4472 -2.25 3.897114 -1.539091 4.228617 -0.781417 4.431635 0 4.5 0.781417 4.431635 1.539091 4.228617 2.25 3.897114 2.892544 3.4472 3.4472 2.892544 3.897114 2.25 4.228617 1.539091 4.431635 0.781417 4.5 0 5 0 4.924039 0.868241' solid='false'>
+            <!-- spine is open, crossSection is closed -->
           </Extrusion>
           <Appearance>
             <Material DEF='StrongBlue' diffuseColor='0.003922 0.52549 0.768627'/>