This image is from a demonstration in Photographing Flowers about how to recreate Vincent van Gogh sunflowers. In Photoshop, starting with a pretty normal photo of a sunflower on a black background, I worked on the flower with the Topaz Simplify set of filters and (most importantly) the Pixel Bender OilPainting filter.
You may be interested to know that Pixel Bender is a free download from Adobe Labs. You get a whole bunch of filters and effects including OilPainting when you download Pixel Bender.
Having gone this far, I decided that my Go van Gogh Sunflower needed a starry sky. So I did the Pixel Bender thing on a stacked star circle image—with a little Photoshop Liquify filter magic thrown in as well.
The great painter Vincent van Gogh often signed his works “Vincent,” so I felt that the least I could do in this homage was to add a digital “Harold” signature.