[Gimp-user] wet label - how to

[Imre Steer <steeri@freemail.hu>]

Hello.

I'm a new GIMP user and a have a problem about
 the sample presented in the GIMP User's manual
 v1.0.0. It is the one with a bottle and a wet
 Unix label on it (2nd example in the 'GIMP
 around in 80 minutes' section).
It uses a photo of waterdrops (desaturated) for
 the illusion of wet surface on a picture of
 mountains. It uses a mask to displace the
 background from the photo of waterdrops to
 create the illusion of water.

My problem is that I don't understand how to
 create this mask. It is not clear in the manual
 how to do this.

Could you advise another way for such an effect?

I hope somebody understand what a want to say.

Imre Steer