Over the next month or so Source will see a numer of updates. Apart from new maps for Couner Strike Source, Valve have revamped the "Highway 17" chapter of Half Life 2 with new technology and have designed a new level to be released over Steam (free of charge) to customers who meet a specific "High-end" hardware requirement.
Valve have been sketchy with the details of the requirements but have said they will be released shortly.
One feature that we'll be adding to the Source engine in the coming months is high dynamic range lighting. To showcase this we've taken a part of the Highway 17 chapter of Half-Life 2 and worked it into a single level that incorporates HDR along with some new gameplay. We're calling this short level "The Lost Coast," and it will be made available free of charge to Half-Life 2 customers that meet a specific set of high end hardware requirements. We'll be publishing those requirements soon.
Some concept art is available here, here, and here
Visit Steampowered for more information.
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