I've just started experimenting around with sketcher free on my cheap tablet, and it's quite a bit of fun.
Let's see if I can make this better in gimp.
Let's start off with the original image.
Let the editing begin!
First off I tried doing some layer duplication, with one layer using edge detect.
The difference is barely notable.
Also noticed I forgot to delete the alpha layer on the original image. I might have wasted a lot of time on this later on, had I neglected this..
Won't add this intermediary step, but I experimented with the "old photo filter as well.
I dropped this version and added some lighting effects instead.