+@code{#f}. If this is the case, you can instead use the
+@code{point-stencil} function, which sets the stencil to a object
+with zero size:
+
+@lilypond[quote,verbatim,relative=2]
+{
+ c c
+ \once \override NoteHead #'stencil = #point-stencil
+ c c
+}
+@end lilypond