| Error | Cause | Solution |
|-------|-------|----------|
| “Unsupported version” | Game uses a newer archive format | Update SB3Utility to the latest release. |
| Texture import fails | Wrong dimensions (not power of two) | Resize to 256x256, 512x512, 1024x1024, etc. |
| Mesh looks broken in game | Vertex count changed or normals missing | Do not add/remove vertices; recalc normals in Blender. |
| Archive won’t save | File is read-only | Remove read-only attribute from the .unity3d file. |
| Missing shaders after modding | Material references broken | Do not change material names; use original shaders. |
Before diving into the tutorial, know that an .sb3 file is simply a ZIP archive containing: sb3utility tutorial
SB3Utility exposes this structure directly. When you change a costume here, you are literally replacing the file inside the ZIP. | Error | Cause | Solution | |-------|-------|----------|
SB3Utility includes a built-in JSON Editor for tweaking properties that have no GUI. Before diving into the tutorial, know that an
sb3utility is a Windows program for browsing, extracting, and editing files from Nintendo Switch game backups (.nsp, .xci) and their contents (ROMFS, ExeFS, tickets, saves). Below is a concise tutorial to get started.
If you clarify exactly which sb3utility you need, I can provide a complete, ready-to-run tutorial with examples.