How to use H3 Game Sprites: what you can do with it

3 use cases

• Cut a generated move clip into keyed sprite frames

  Turn one AI-generated punch or kick clip into transparent, keyed sprite frames you can check.

  • REPO gary149/h3-game-sprites
  • Claude Code
  • Games and hobbies
  • Advanced
  View prompt

  Using the h3-game-sprites repo, cut the move clip at <path to clip.mp4> into 12 keyed frames with scripts/sprite_cut.py, writing to sprites/<move-name>. Report the output folder contents and the key purity and return-to-start numbers from the metrics report, and confirm the first and last frames match the idle still.

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• Build a seamless walk cycle from a generated clip

  Get a walk loop that resets cleanly instead of visibly jumping back to a start pose.

  • REPO gary149/h3-game-sprites
  • Claude Code
  • Games and hobbies
  • Advanced
  View prompt

  Using the h3-game-sprites repo, run scripts/sprite_cut.py with --loop on <path to walk.mp4> and 8 frames, writing to sprites/walk. Report which frames were selected and whether the cycle is seamless, citing the metrics report.

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• Pack a character's moves into one engine-ready atlas

  Combine idle, walk and attack frames into one atlas at a single global scale with shared anchors.

  • REPO gary149/h3-game-sprites
  • Claude Code
  • Games and hobbies
  • Advanced
  View prompt

  Using the h3-game-sprites repo, build an atlas from the cut move folders in <sprites directory> using scripts/build_atlas.py with --ref idle, writing atlas.json. Report the moves included and the global scale, and confirm that one rendered test frame stands on the floor.

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Quick start with H3 Game Sprites

1. Check you have what it needs: ffmpeg installed locally; Python 3 with Pillow and numpy; A video model such as H3 / Hailuo 3 via OpenRouter, fal or MiniMax, or an ordinary video file you already have.
2. Open gary149/h3-game-sprites on GitHub and read the README and license.
3. Generate the character still on a flat magenta backdrop in side view, then generate the move clip with the first and last frame set to the same idle still (the idle pin).
4. Save the clip as clips/punch.mp4.
5. Run python3 scripts/sprite_cut.py clips/punch.mp4 sprites/punch --frames 12.
6. Open the strip, the GIF and the metrics report in sprites/punch and check key purity per frame and the return-to-start figure.

These steps come from our top use case, Cut a generated move clip into keyed sprite frames, which also has a copy-paste agent prompt.

Using the Deduped MCP, get the setup steps for gary149/h3-game-sprites

claude mcp add --transport http deduped https://dedupedai.com/mcp

H3 Game Sprites alternatives · Best AI repos for Games and hobbies

About this repo

• Who it is forIndie game developers and hobbyists who want 2D character animation from AI video clips, and agents that run the pipeline for them.
• Why it is hot146 stars, launched 70 days ago
• LanguagePython
• Sourcegithub.com/gary149/h3-game-sprites · Back to Hot repos

Requirements

• ffmpeg installed locally
• Python 3 with Pillow and numpy
• A video model such as H3 / Hailuo 3 via OpenRouter, fal or MiniMax, or an ordinary video file you already have
• An image model or illustrator for the character still (gen_still.py defaults to Nano Banana through OpenRouter and reads OPENROUTER_API_KEY)
• Budget of roughly $0.60-0.70 per five-second clip plus a few cents per still, varying by provider

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