GIMP bump map tutorial
Scale your logo and create a new image
The first thing to do is decide what size you want your photos to be displayed at, in the case of this tutorial our photos are 524×393px.
Scale your logo to a reasonable size for the photo it will display in.
On the image toolbar create a new blank image
File » New
You can fill the new image by clicking the Advanced Options and choosing from the Fill with options.
For this exercise the logo background is transparent, so choose a transparent fill for the new image.
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