Tool get´s invisible after selecting subtool by alt+click

[Faber_Draconis]

I select subtools by alt-clicking and this time I´d been a bit unpatient and doubletipped with this result.
When turning the tool different parts of it getting visible/invisible. And no, I didn´t hide by accident

[aurick]

Is the SubTool invisible in the thumbnail found in the SubTool menu as well? If so, select that SubTool and press Edit>Tool Undo. This should make it visible again.

[Faber_Draconis]

Hmm, really weird. Must have been sth with the graficcard, coz after rebooting it´s got normal.
Relaunching ZBrush hab no effect, neither undoing.

But thx4help