How about trying out some grunge textures over a sepia photo?
google "gunge textures" there are loads out there it will just be finding the right one
Here's a link to some i found earlier and a grunge texture
brush
http://veredgf.fredfarm.com/textura/index.html
and here is a link to the artists deviantart page so you sort of get the idea although it is a different topic covered
http://veredgf.deviantart.com/art/Co...tures-39096578
and one very hasty attempt with a grass texture i had on my hard drive again done just so you get a idea
It will be interesting to see what you come up with, i am now off to look through the deviant page as it looks quite interesting ( distracted again


but a welcome distraction )
Palms