3D printing didn’t suddenly appear — it slowly clicked into place. In Episode 2 we look at the early patents, the people behind them, and the three big process families that still shape how 3D printing works today. (Glossary included, because nobody needs acronym soup.)

From a 1945 fiction idea to the first real breakthroughs: the foundations that made 3D printing possible, and why slicing and workflow still matter today.