Immediately after killing off the "Corrupted Forma" and unlocking the achievement for doing so:
go to the bottom of the room and pick up the "ghost" floating above the dead forma. That should unlock this achievement, plus give you the Turbo Boost ability. Now when you press the Y button, your character will move briefly with a burst of speed. Applying this skill as you approach one of the white cloud-like barriers will allow you to go through it. Yeah!