While Portal's clean white rooms were the visual star of the first game, Chell, the player's character in the game, was also memorable. For Portal 2, however, that trademark orange jumpsuit has gone straight out the window.

A feature over on Game Informer has revealed a number of pieces of concept art for the game (which were only teased in the recent magazine reveal), showcasing the redesign currently underway on Portal 2's main character. Gone is the "prisoner" look of the jumpsuit, replaced this time by a look more suited to a lab rat than a criminal.

Chell now has, in these pictures at least, a dainty little lab cap, a suit that's part-test subject, part-Tron survivor, and at this stage at least, her famous spring-heeled contraptions are still attached to her legs.

This design isn't final, so don't go crafting your Portal 2 fan fiction or machinima epic around them just yet, but at the least they give you an idea of the direction Valve is taking with the visual design of this game.

Redesigning Portal: Valve's Artist Speaks [GameInformer]