1 Take a walk in a suburb during the day.
2 Look for a tree of medium girth with a straight smooth trunk.
3 Walk around the tree facing the trunk.
4 Chose the direction that gives the best split image.
5 Take a frontal picture of the trunk with a left and a right view.
6 Crop the image into a square of three equal vertical strips.
7 Give each strip its own colour adjustments.
8 Make the complete image sharp.