I converted Descent from Myst V with the new updates for Drizzle. My god, the entire shaft, from top to bottom, is completely drawn and it is monstrous. It literally is three miles down. Can you imagine, if MORE becomes a success and this shaft replaces the one from MOUL and To D'ni, just how long it would take you to walk from top to bottom. It is literally bigger than Minkata in size. I haven't imported it yet into Blender, but I would not be surprised if the shaft was over 50 thousand blender units in z height. Its that big. Here's an image just to give you an idea:
This is Descent as seen from the Middle looking Up:
And this is Descent from the same spot, looking down:
Now, to appreciate the size. That small room you see at the bottom of the image. Thats the room from the POTS version of Descent. You can't see the bottom of the shaft from this angle. So, imagine the Descent we're familiar with in Uru, starting at that point and continuing down.