Check out this rather awesome walkthrough poster of Out of the Abyss by comic artist and illustrator Jason Thompson. "Jason Thompson illustrates the misfortunates of a group of adventurers as they navigate the Underdark and play through the story featured in Out of the Abyss." The map contains spoilers! It's available in three sizes/resolutions over at the official D&D website. Click here or on the image below to jump there.