Needless to say, this is impressive.
I\'m having a hard time comprehending how you could have possibly done all this by hand. Building complex geometry on a large scale is a very difficult task for a person to be able to visualize and complete block by block. Not to mention the absurd amount of time you\'d have to spend staring at your computer placing blocks.
Not that I can claim you are lieing, I just find it really hard to believe. There are indeed voxel editors out there that allow you to easily customize the output format of your voxel designs and edit the block set while building, but I digress.
Nice work.