My PC updated to Windows 10, and it seemed to go flawlessly until trying to run the scripts to setup this image. Permissions were easy to fix, but an unused mysterious missing font turned out to be the thorn in the watermarking script.
An actual 3d fractal flame, hovering over an ocean. It's actually a composite of 3 renders, one of the 3d fractal, one of an ocean at the same angle, and a 2d version of the fractal used to cast reflections in the water.
This image rendered for three days on 4 computers before crashing, and losing all the work. I rendered again at wallpaper sizes only, just to get it online. I may never try rendering a commercial version of this one again.