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Smooth Tool; Not Working -- Need Help, ASAP!

Google is not my friend tonight! I need some quick help with Zbrush. I have NO idea what is wrong. But I’ve got a bust I’m modeling that I need done by 9am tomorrow… and my smooth tool is not working at all.

If anyone can tell me how to fix this and get things back in order it would be greatly appreciated!! :frowning:

close and re-opensometimes it work again

That’s the first thing I tried. Closing the program, then re-opening. When that didn’t work, I restarted my computer. Still nothing.