SB3Utility (commonly known as SB3U) is a powerful, versatile open-source tool primarily used for viewing, extracting, and modifying 3D assets, textures, and animations from various game engines. While it is heavily associated with Japanese 3D games and visual novels, its core capabilities apply to a wide range of asset-modding tasks.
Expand the file structure in the center panel to find the or XX node. Step 2: Export the Mesh Click on the Mesh tab in the lower panel. Select the specific mesh component.
Click the asset to load it into the to confirm it is the correct item.
You can inject entire custom blocks or hack the "pen" extension to run faster by modifying the argument limits in the JSON. (Note: This may break compatibility with the strict Scratch editor).
For many modders, it is the essential starting point for any project, whether you are looking to adjust a character's appearance, create entirely new outfits, or import custom items from other games. The tool allows you to peek inside the .unity3d and .pp files that contain all of a game's 3D models, textures, sounds, and configuration data.
Texture swapping is the easiest way to begin modding. It allows you to change clothing colors, add tattoos, or smooth skin textures. Step 1: Exporting the Original Texture Open your target asset archive in SB3Utility. Locate the Texture2D folder or list within the asset tree.
import zipfile import json import shutil import os
Move your newly generated archive file into your game's data directory, replacing the original file (or placing it in a modloader folder if the game supports it). Launch the game to test your modifications.
SB3Utility simply unzips these files, lets you edit the JSON safely, and re-zips them without breaking the Scratch signature.
Before diving into the tutorial, know that an .sb3 file is simply a ZIP archive containing:
The game engine cannot read the texture compression format or the material shader lost its link.