In what I can only assume is one of the first of many similar projects, a 3D-printed Steam Machine clone is making the rounds online. The custom gaming PC comes from Jacob Terkelsen, an AMD AI GPU engineer who recently posted his personal creation on X.
The Terk Box v1.1, as it's known, is a compact mini-ITX build that uses a custom 3D-printed case that you, too, can download and try out if you're so inclined. It's available on Printables alongside a parts list, which was created by a user named 3DCatt.