diff --git a/Engine.cc b/Engine.cc
index bace933..f49ab4f 100644
--- a/Engine.cc
+++ b/Engine.cc
@@ -159,7 +159,7 @@ Engine::Object * Engine::getObject(int id)
     return m_objects.find(id) != m_objects.end() ? m_objects[id] : NULL;
 }
 
-int Engine::startFrame(lua_State * L)
+void Engine::startFrame()
 {
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glMatrixMode(GL_MODELVIEW);
@@ -167,13 +167,6 @@ int Engine::startFrame(lua_State * L)
     gluLookAt(m_eye[0], m_eye[1], m_eye[2],
               m_center[0], m_center[1], m_center[2],
               m_up[0], m_up[1], m_up[2]);
-    return 0;
-}
-
-int Engine::endFrame(lua_State * L)
-{
-    /* TODO: figure out how to SDL_GL_SwapBuffers(); */
-    return 0;
 }
 
 int Engine::setCamera(lua_State * L)
@@ -214,6 +207,7 @@ int Engine::setCamera(lua_State * L)
 
 void Engine::update()
 {
+    startFrame();
     if (m_autoPhysics)
         doPhysics();
     lua_getfield(m_luaState, LUA_GLOBALSINDEX, "update");
diff --git a/Engine.h b/Engine.h
index afef436..dbccec2 100644
--- a/Engine.h
+++ b/Engine.h
@@ -63,8 +63,6 @@ class Engine
         void update();
 
         /* lua services */
-        int startFrame(lua_State * L);
-        int endFrame(lua_State * L);
         int setCamera(lua_State * L);
 
     protected:
@@ -75,6 +73,7 @@ class Engine
         {
             return new Object(is_static, m_world, display_list, scale);
         }
+        void startFrame();
 
         lua_State * m_luaState;
         std::string m_program_path;
diff --git a/ag.cc b/ag.cc
index ab5db3b..bbf8751 100644
--- a/ag.cc
+++ b/ag.cc
@@ -26,8 +26,6 @@ namespace ag
             { "loadModel", loadModel },
             { "loadStaticModel", loadStaticModel },
             { "sleep", sleep },
-            { "startFrame", startFrame },
-            { "endFrame", endFrame },
             { "setCamera", setCamera },
             { "elapsedTime", elapsedTime },
             { "doPhysics", doPhysics },
@@ -199,16 +197,6 @@ namespace ag
         return 0;
     }
 
-    int startFrame(lua_State * L)
-    {
-        return g_engine->startFrame(L);
-    }
-
-    int endFrame(lua_State * L)
-    {
-        return g_engine->endFrame(L);
-    }
-
     int setCamera(lua_State * L)
     {
         return g_engine->setCamera(L);
diff --git a/ag.h b/ag.h
index df4abe1..a3cb45d 100644
--- a/ag.h
+++ b/ag.h
@@ -12,8 +12,6 @@ namespace ag
     int loadModel(lua_State * L);
     int loadStaticModel(lua_State * L);
     int sleep(lua_State * L);
-    int startFrame(lua_State * L);
-    int endFrame(lua_State * L);
     int setCamera(lua_State * L);
     int elapsedTime(lua_State * L);
     int doPhysics(lua_State * L);
diff --git a/anaglym.cc b/anaglym.cc
index c9ef4ee..2cdc814 100644
--- a/anaglym.cc
+++ b/anaglym.cc
@@ -167,6 +167,8 @@ static void mainloop()
                 goto RET;
                 break;
             case SDL_USEREVENT:
+                if (lastUpdateCompleted)
+                    SDL_GL_SwapBuffers();
                 if (event.user.code == 0)
                 {
                     update();