How do you add wrinkles to pictures using Gimp?

[Fort]

you can enhance wrinkles on some faces, or carefully add new lines to image, and add wrinkled effects to those lines, you want to emboss a type of bump map on to image,
hxxp: www. linuxtopia. org / online_books / graphics_tools / gimp_advanced_guide / gimp_guide_node74. html
hxxp: registry. gimp. org / taxonomy / term / 123

Gimp aging effect
hxxp: photoblog. edu-perez. com / 2009 / 07 / aging-portrait-gimp. html

search for wrinkle or gritty lined brushes to apply to surface,
hxxp: www. deviantart. com / #order=9&q=gimp+brushes

hxxp: www. graphics-muse. org / artistsguide / ?page_id=65
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