Here's a megaproject I made in 40d16 late last year, thought some people might be interested.Essentially, it's a huge floating oblate spheroid, with a side-to-side diameter of 64 and top to bottom diameter of 32. I made it by building the lower half shell out of basalt, then filling it in with obsidian via a lava/water pumping tower thingy; once the lower half was filled in, I built each outer shell layer then filled it in before doing the next. Lava was supplied by a volcano, and water from an underground river. If anyone wants to build their own fortress in the inside of it, I have a save from when the sphere was done but before I started carving into it (if someone could let me know a decent place to upload it, that'd be great).As it turns out, I built it a bit too close to the lower edge of the map and one side got a bit squished, but that makes it look more like a death star, so I can't complain.And, without further ado, pics:The first five levels of the lower shell: http://imgur.com/2khmI.jpg The completed lower shell: http://imgur.com/L0x2G.jpg The obsidian casting tower: http://imgur.com/0B9hV.jpg The first layer of obsidian casting: http://imgur.com/lbva7.gif View from inside during casting: http://imgur.com/WusNI.jpg It became apparent that the initial casting tower wasn't up to the job, here's the MkII casting tower: http://imgur.com/afw20.jpg Another angle: http://imgur.com/sAlCU.jpg And yet another: http://imgur.com/OfZwP.jpg Side view: http://imgur.com/E85um.jpg The first layer poured with the new tower: http://imgur.com/4UX6u.gif Another view from inside: http://imgur.com/usK8e.jpg Time-lapse filling of the lower half: http://imgur.com/4TGx4.gif http://imgur.com/UtFUy.jpg 18 HalfDone.jpg http://imgur.com/2Gb7Y.jpg 19 HalfDone.jpg http://imgur.com/eEC1d.jpg 13 HalfDone.jpg http://imgur.com/vdVFk.jpg 14 HalfDone.jpg http://imgur.com/6hU9w.jpg 15 HalfDone.jpg http://imgur.com/jzWjP.jpg 16 HalfDone.jpg http://imgur.com/ys9v8.jpg 17 HalfDone.jpgThe volcano was full before I started: http://imgur.com/yQSgD.jpg There were a few little holes that got missed when building the lower half, here's the contraption I used to help fill them, along with its deconstruction: http://imgur.com/C7P2n.gif An animation of the first top layer being cast: http://imgur.com/2TjHr.gif Time lapse of a few more top layers: http://imgur.com/pDYir.gif A bunch of pictures from when it was almost done:The last layer and starting the deconstruction of the casting tower: http://imgur.com/rLpyE.gif A crude fly-by of the sphere after the casting tower was removed. A couple of holes remain: http://imgur.com/Y5cAJ.gif