Indie dev builds space game with hundreds of star systems using OpenAI's Astra, shares full workflow
Dimillian · x · 2026-09-05
Well-known indie developer Dimillian (Thomas Ricouard) published a blog post, "Building games with Astra", detailing how he built the space exploration game Void Explorer with OpenAI's Astra model:
- Massive scale: fly between hundreds of star systems and explore thousands of procedurally generated Earth-sized planets — everything visible is reachable, with simulated orbits and lighting that shifts by star type
- Workflow: he first used Imagen for concept art to lock the art direction, then had Astra build the first vertical slice (procedural terrain, real-sized planets); the ship is the only non-procedural asset, modeled in high detail in Blender from concept art and integrated into the game
- Tech stack: nearly everything is code-generated, rendered with threejs and WebGPU; Astra is notably strong at raw/procedural 3D
- Seamless experience: descend from space straight to alien landscapes, with art style, lighting and phosphor filters all steered by prompts
The post doubles as a playbook for translating intent directly into gameplay and visuals with AI models.
Related event: Developer builds explorable universe game with Astra(4 posts)→
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