diff --git a/libsrc/csg/csgeom.cpp b/libsrc/csg/csgeom.cpp
index b643c1a5..19b2ffb2 100644
--- a/libsrc/csg/csgeom.cpp
+++ b/libsrc/csg/csgeom.cpp
@@ -1060,7 +1060,7 @@ namespace netgen
 			IndexSet & iset,
                         int level)
   {
-    if (level > 10) return;
+    // if (level > 10) return;
 
     //tams.AddTriangle (tria);
     //(*testout) << "tria " << tams.GetPoint(tria[0]) << " - " << tams.GetPoint(tria[1]) << " - " << tams.GetPoint(tria[2]) 
diff --git a/tutorials/test.dem b/tutorials/test.dem
new file mode 100644
index 00000000..9a218e2f
--- /dev/null
+++ b/tutorials/test.dem
@@ -0,0 +1,20 @@
+# Demo file
+
+t = 0;
+
+camerapos (0 : -7,0,0;  1: -6,0,0; 10: -5,0,0);
+camerapos (10: -5,0,0; 11: -5,-5,0; 12: 0,-5,0);
+camerapos (12: 0,-5,0);
+
+camerapos (14: 0,-5,0; 15: 0,-4,0);
+camerapos (15: 0,-4,0; 16: 4,-4,0; 17: 4,0,0);
+camerapos (17: 4,0,0; 18: 4,4,0; 19: 0,4,0);
+camerapos (19: 0,4,0; 20: -4,4,0; 21: -4,0,0);
+
+camerapos (21: -4,0,0);
+camerapos (22: 0,-4,-4);
+camerapos (23: -4,0,-4);
+camerapos (24: -4,-4,-4);
+
+camerapos (25: -4,-4,-4; 30: 4,-4,-4; 35: 4,4,4);
+