I have not done this tutorial. But, I believe that you Ctrl I the layer mask -I easily get confused with masks and stuff I also usually forget the name's of the parts of Photoshop so I might not be totally reliable. And, if I am reading it the right way.. >_> - and paint with white.
-I easily get confused with masks and stuff I also usually forget the name's of the parts of Photoshop so I might not be totally reliable. And, if I am reading it the right way.. >_> -
Ps: I am also a noob. So, my help might not be entirely reliable.