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For use in some of my presentation slides, I hope to edit some of my images with The GIMP so that one (or more) side(s) will fade into transparency. How do I do this in GIMP?

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2 Answers 2

up vote 15 down vote accepted

You could flatten all the layers, then add a layer mask, and paint a white-to-black gradient on the mask. The black part will be transparent.

If you wanted all sides to fade to transparency, you could start off with a black layer mask, then draw a white rectangle inside it, and apply a blur. In any case, I think starting off with a layer mask is what you want.

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Got it, thanks! –  hpy Feb 21 '11 at 17:26
    
Yes, this would be another time to use the QuickMask Toggle in the lower left hand corner. The gradient is what I would use. –  Ele Munjeli Aug 30 '11 at 13:09

I know this post is a little bit older, but i wrote these days a tutorial about this. Maybe it can help other people in the future.

http://infofreund.de/gimp-transparent-gradient/

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You should include the essence of the linked article to the answer. The idea is to make Super User complete and independent from external resources. –  Jawa Aug 5 '13 at 8:29

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