tl;dr: Wube has released 3D-printable models of Factorio entities, free to download from Prusa's Printables profile. The set includes 15 model sets (65 models, 247 STL files) focused on early-game content, with two variants: precision push-fit and high-clearance for gluing. Developers detail the challenges of translating Factorio's isometric-perspective assets—which often cheat proportions and hide unmodeled back-sides—into physically accurate prints, plus techniques like splitting biter shells from legs to minimize visible support scarring.