https://eliashasle.github.io/viper.html
A photo of a viper/adder (https://en.wikipedia.org/wiki/Vipera_berus) projected onto a 3D plane and combined smoothly with a skyscraper. Tailored GUI controls for adjusting the geometry and lighting to match the photo. (Time and place of the photo were known, allowing me to determine solar inclination angle. Therefore, that variable is not in the GUI.)
