FusionFall Retrobution 2025 Asset Dump – Reverse Engineer Animated Model Imports using asset bundles

• 2010: Base assets from Cartoon Network’s FusionFall​
• 2020: Content added during the FusionFall Retro project​
• 2025: New Retrobution-exclusive content and structure updates
  
  What’s Included:
  
  Compressed Asset Bundles:
  
  Formats: .resourceFile, .unity3d
  Compression: LZMA
  Unity Version: 2.5.5bf
  These are original FusionFall bundles compatible with clients like OpenFusion
  Note: Not ideal for modding due to compression
  
  Decompressed Asset Bundles:
  
  Exported to: CustomAssetBundle, BuildPlayer, and BuildPlayer-Map_xx_xx.sharedAssets
  Ideal for inspection and modification, These can be loaded in tools like DevX Unpacker for analysis
  
  Raw Asset Dump:
  
  Includes textures, mesh files (.obj), and loose game data
  No rigging or animation—this is a flat dump of decompressed files using the UnityPackFF method (ffextract.py)
  Useful for manual edits or conversions into modern unity pipelines​

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Tools and Resources​

• UnityPackFF: A specialized fork of UnityPack tailored for FusionFall assets, facilitating extraction and analysis.
• FFStudio: Customized AssetStudio that works with FusionFall asset bundles.
• DevX Unpacker (Legacy): Useful for inspecting and modifying decompressed asset bundles.

For a detailed guide on importing animated models, refer to:
How to Import Animated Models into FusionFall – 4 Essential Custom Modding Scripts

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Technical Structure for Animated Models​

• m_Name: Identifies the asset bundle or container group.
• m_Container: An ordered dictionary mapping asset names to object pointers.
• m_PreloadTable: Lists all objects to be loaded at runtime.
• preloadIndex: Within m_Container entries, this value points to the corresponding index in m_PreloadTable.
  
  Maintaining the integrity of these structures is essential. For example, when adding new animated NPCs, it's imperative to:
  
  1. Ensure all related assets (models, animations, rigs) are correctly referenced in m_Container.
  2. Include these assets in m_PreloadTable in the appropriate order.
  3. Set each preloadIndex to match the asset's position in m_PreloadTable.
  4. Preserve the m_MainAsset reference to indicate the primary asset to load.
  This structure mirrors that of existing animated models in FusionFall.

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