Developer builds a 3D game with Astra and Codex in 12 hours

UModeler X PicoBerry @UModelerOriginally posted 2026.09.12

Open original on X

GPT-6 Astra and I built this game in 12 hours — here is the full breakdown. I wanted my own style in it, so I wired the PicoBerry API into Codex and generated the 3D models from images. Concept art first — a village, a dungeon, a boss room — and Astra grew those pictures into something you can actually play. The village layout, the boss animation, the parts that still took my hands: it is all in the video. You can play The Legend of Deller yourself — link in the comments.