This was one of my first creative photos where I did lots of post-processing in order to get the effect I was looking for. The phot was taken a cold winter night, the structure you can see are the branches of a tree. The black mist is the smoke from me exhaling in front of the camera just as the photo was taken.
In post-process I have colorized it green then inverted the dark areas for the bright ones. The smoke and branches are therefore brightly lit by the flash in the original picture but turned dark in post-process.
Tools used for post processing was The GIMP, a free photo editing software that is also multi platform, works just as well under Linux as it does in Windows.
On the terms of the abstract, sometimes you can make interesting effects by breaking every rule in photography. Here is an example where I was indoors, used long shutter time and moved the camera around to create the effect.
(Should be filed under ”things to do when bored at work: wave your camera around”)