Some of the coolest in-development screen-shots are the bugs. A few weeks ago while working on cloud shaders I managed to create a hybrid of an acid trip and a light-speed trip on Star Wars. Sadly the code has since been modified a thousand times and the effect is gone.
So I'm going to start posting bizarre images as they crop up. Usually they don't reveal too much about unreleased features.
This came out of some experiments with hills, mountains and UV mapping.
(Clearly what this code needs is a leopard-print texture.)