added -d flag to usage information

git-svn-id: svn://anubis/fart/trunk@207 7f9b0f55-74a9-4bce-be96-3c2cd072584d

main/fart.cc

@@ -19,6 +19,7 @@ void usage(const char * progname)
     cout << "    -h|--height <image-height>" << endl;
     cout << "    -m|--multisample <level>" << endl;
     cout << "    -f|--field-of-view <vertical-fov>" << endl;
+    cout << "    -d|--max-depth <max-recursion-depth>" << endl;
     cout << "    -v|--verbose" << endl;
     exit(42);
 }

scenes/infinity.fart

@@ -11,7 +11,7 @@ scene
 
     camera
     {
-        position <0, -1.9, 0>
+        position <0.00001, -1.9, -0.000001>
         look_at <0, 0, 0>
         up <0, 0, 1>
     }