The skeleton structure must remain identical.
Open the asset file in SB3Utility and navigate to the tab. Select the texture you want to change. Click Export and save it as a .png or .dds file.
[Asset Bundle] ──(Export FBX)──> [Blender / 3D Editor] ▲ │ │ ▼ (Replace Mesh) ◄──(Drag FBX into SB3U)── [Edited FBX] Step 1: Exporting the Source Mesh Open the asset bundle and navigate to the tab.
button on the original mesh to find its exact location in the hierarchy. sb3utility tutorial
If you have ever downloaded a .sb3 file from Scratch (the popular visual programming language) and wished you could batch-rename sprites, extract all sounds at once, or fix a corrupted project, you have likely hit a wall. The standard Scratch editor doesn't allow advanced file manipulation.
Which (e.g., Unity, Illusion Engine) you are modding.
Look for the tab or sub-panel within the file viewer. Load your new .fbx file. The skeleton structure must remain identical
: Do not change the bone names, bone weights, or the vertex group structures. Doing so will break how the mesh moves with the game's rigging framework. Export the file back out as a standard .fbx . Step 3: Replacing and Recalculating the Mesh Drag your modified .fbx file into SB3Utility.
Allows you to rotate, pan, and inspect your 3D models.
This comprehensive tutorial will guide you from downloading the software to successfully executing your first asset modification. 1. Introduction to SB3Utility Click Export and save it as a
Mesh modding is significantly more complex but represents the true power of SB3Utility. To alter the 3D shape of a skirt, hairstyle, or accessory, the user must first export the mesh, typically as an FBX or OBJ file. This file is imported into Blender, where the geometry is manipulated. The critical challenge here is bone weighting. The model must retain the "skeleton" information so it moves correctly in-game. SB3Utility facilitates this by handling the .xx file structure, ensuring that when the modified mesh is imported back into the game, the bone weights are mapped correctly to the game’s animation rig.
Open the exported file in your 3D modeling software (e.g., Blender, Metasequoia). Make your changes to the model. Note: Do not change the rigging (bones) unless you know what you are doing. Step 4: Import the Modified Mesh
Before diving in, you need to understand that SB3Utility directly modifies game archives (such as .pp or .unity3d files). Always create a backup of your original game files before making any edits. Required Tools
: 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