yes, this is the first time I have tried them out.. could not figure them out before...
Anyway, someone pointed me in the direction of this tutorial on masks and now I have discovered the simple tasks I could have been doing with it like erasing things... and being able to fix the over erasing...
.. but I have also been playing with it for fun today because I needed something to do.. I find my creation a little creepy and I feel it took a lot of skill but I had some fun playing, and getting an idea of what I can do with masks, and now I'm starting to understand how some things I've admired are accomplished.