Freshmeat listed an interesting new project called Long Exposure Tools. Like many cool ideas, it’s actually very simple. It takes multiple exposures, and combines them in various ways to simulate long exposures. That doesn’t sound that cool, but the nifty thing is the various modes that it uses to combine them. Their primary example shows several exposures of a busy street with cars driving along. When combined in various ways, you can generate a custom plate that shows the street either as entirely empty or alternatively entirely packed with cars.