Pseudo-realtime interactive video with MiniMax H3: a 14-scene corgi adventure for $2.50
super3 · reddit · 2026-08-22
Chasing realtime interactive AI video but hitting 22s per 5s clip on one GPU, the author pivoted to pre-generating branches so it feels realtime.
The result: a corgi choose-your-own-adventure with 14 scenes, 2 paths, 7 endings, each a 15-second MiniMax H3 generation with synced audio. Key tricks:
- Using the model's first-last-frame-to-video mode, each branch starts from its parent scene's final frame for seamless cuts
- Choices appear at the 10s mark and both next clips preload while you watch — zero buffering
- The whole tree was rendered once in play order and cached globally, costing only $2.50 in GPU time
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