# If you meant 'sb3-utils' npm package
npm install -g sb3-utils
sb3-utils info project.sb3
sb3-utils extract project.sb3 ./output
sb3-utils pack ./output new_project.sb3
If you want a step-by-step example (e.g., extracting RomFS and replacing a single file), say which action and I’ll provide a focused walkthrough.
(follow-up suggestions: "sb3utility download", "sb3utility replace file", "sb3utility extract RomFS")
SB3Utility (often abbreviated as SB3UGS) is a specialized modding tool primarily used for editing Illusion game files (like Koikatsu, Honey Select, and AI Girl). Unlike simple extractors, it allows you to directly modify, swap, and export 3D assets, textures, and animations within .unity3d asset bundles. Core Functions & Workflow
Asset Bundles: Use it to open .unity3d or .arc files to view internal resources like meshes (SkinnedMeshRenderer), textures (Texture2D), and materials.
Model Swapping: High-level modding often involves exporting a game's model as an .fbx, modifying it in Blender, and then using SB3Utility to Replace the internal mesh while preserving the game's original bone structures. sb3utility tutorial
Texture Editing: You can right-click any Texture2D asset to export it as a .png or .tga, edit it in Photoshop, and then Replace it to update character outfits or UI elements. "Deep Content" Modding Steps
Preparation: Download the latest version from the SB3Utility GitHub repository.
Navigation: Use the Asset List tab to find specific objects. Deep editing usually requires looking into the Animator or SkinnedMeshRenderer components to find which materials are assigned to which body parts. The "Replace" Method: Load the original game file. Load your modified file (e.g., a new .fbx or .png).
Drag and drop the new component over the old one and select Replace. # If you meant 'sb3-utils' npm package npm
Save and Re-compress: Always save the bundle after changes. For newer games like Koikatsu, it is recommended to package these changes as a .zipmod for easier management. Key Resources
Official Repository: Access the source code and latest releases on GitHub.
Modding Wikis: The Hgames Wiki provides specific tutorials for older Illusion titles.
Community Guides: Comprehensive documentation for modern titles can be found in the Koikatsu-Modding GitHub Index. If you'd like to dive deeper, let me know: Which specific game are you modding? If you want a step-by-step example (e
Are you trying to swap models, edit textures, or modify animations?
Are you encountering a specific error when saving or replacing files?
I can provide a step-by-step walkthrough for your exact goal. Honey Select UI Modding Tutorial
While SB3Utility is a fantastic tool for personal backup, repair, and accessibility, respect these boundaries: