For many, blue skies still rule when it comes to taking jaw-dropping photos with maximum impact. That rich blue, often boosted with the cunning use of a polarising filter, and the accompanying direct sunlight that can bring a scene to life in a burst of colour and contrast. We’re not just looking for blue skies in landscapes. They’re present in many genres of photography, but for this contest let’s make them a key feature of the scene, and not too incidental.