Velux Fractal Season
When the conditions are just right fractals form on veluxes and they are beautiful. It requires the air to be cool enough for ice to form, but as thin layers, rather than thick. If the wind is just right then you end up with patterns such as the one below.
Fractal frost on a Velux
This morning all of the windows had a nice pattern so I photographed them twice. The first time when they were lit by indirect sunlight and the second time when they were.