I've been playing with a Casio camera. It has a function called HDR Art which seems to make hill photos look more wintery! This is possible because a digital camera is just a set of numbers assigned to each pixel based on the amount of charge released as photons of light hit that pixel. Computer software can play with those numbers. Information suggests that the software plays with the contrast - this could be accentuating the difference between numbers. It also increases colour saturation. This means increasing the intensity of the colours. This means giving them a brightness above their natural level. Apparently a colour intensity of zero means a shade of grey.
