GPT-6 Astra builds Hollowflux, a fluid-sim 2D hack 'n' slash, in impressive test
Dimillian · x · 2026-09-05
Developer Dimillian tested GPT-6 Astra by building a 2D game with fluid water effects, producing Hollowflux — a fast-paced hack 'n' slash with strong art style, fluid dynamics, and combat feedback.
- The model implemented a cell-based fluid water system: walking disturbs the water and weapon swings create ripples
- It also handled a follow-up request to render the water as a 3D layer instead of the 2D pixel-art style
- Lighting and water simulation were praised as beautiful, with a full build showcase shared
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