There are a few ways you can make an impressive suit of cosplay armour. You could cast it. You could forge it. You could sculpt it! Or, you could do what Chelsea did here, and use the dark sorcery of 3D printers.
Not everything here was made using a magic box, which is able to just make things, but the important stuff like the helmet was. Believe it or not, the suit - which was actually printed by Matt Serle - was his first big 3D printing project.
If you have access to a printer and want to try something like this out yourself, she's been kind enough to share her 3D plans. You can also follow the work progress blog outlining how everything was made here.