-<input name="PhiResolution" type="int" description="Sphere PhiResolution" special="vtk parameter" />
-<input name="Radius" type="double" description="Sphere Radius" special="vtk parameter" />
-<input name="ThetaResolution" type="int" description="Sphere ThetaResolution" special="vtk parameter" />
+<input name="PhiResolution" type="int" description="Sphere PhiResolution (default 10)" special="vtk parameter" />
+<input name="Radius" type="double" description="Sphere Radius (default 10)" special="vtk parameter" />
+<input name="ThetaResolution" type="int" description="Sphere ThetaResolution (default 10)" special="vtk parameter" />