# 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
| 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. |
Scratch limits imported images to certain dimensions. SB3Utility bypasses this. sb3utility tutorial