Not sure if this is quite within the remit of the group... I was inspired by my visit to the Georgia O'Keeffe exhibition to try and produce a piece of artwork of my own. I was particularly struck by the increasing levels of abstraction in some of her works. As I lack any skill with paint and brushes I started with a photo taken from the Tate balcony and took it from there. No "trick" software, just GIMP, basic pencil tool for most of it, gradient fills for the water. The original measures 3840 pixels - it took a while.