The
Team Fortress 2 Website describes plans for changes to the environments in the multiplayer shooter, submitting a list of questions to fans to get feedback. Here's how this is introduced:
One of the things we're looking at for the next update is the creation of a new type of environment for our levels to be built in. We're pretty happy with the way our environments have turned out so far, but as we create more and more maps with these achievement packs, we want our level designers to have more to work with in terms of giving their settings a unique look.
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Source: Blue's News