Json (UE)
Updated: 09/29/2026
This page contains statements regarding the alpha version.
Summary
Live2D Cubism handles some of the data for runtime in json format.
The Cubism SDK for Unreal Engine includes the Live2dCubismFrameworkImporter module, which parses these files for embedded use and converts them into the .uasset format for use in Unreal Editor.
- CubismModel3Json
- CubismMotion3Json
- CubismUserData3Json
- CubismPhysics3Json
- CubismExp3Json
- CubismPose3Json
- CubismDisplayInfo3Json
CubismModel3Json
This is a class for working with .model3.json files in Unreal Editor.
You can get the path to various other json files, such as motion and facial expressions described in .model3.json.
You can spawn the model in the level by dragging this asset into the viewport in Unreal Editor.
CubismMotion3Json
This is a class for working with .motion3.json files in Unreal Editor.
You can retrieve motion curve and fade settings from the information specified in the .motion3.json file.
CubismUserData3Json
This is a class for working with .userdata3.json files in Unreal Editor.
User data can be applied to the model’s ArtMesh from the information described in .userdata3.json.
CubismPhysics3Json
This is a class for working with .physics3.json files in Unreal Editor.
You can retrieve the physics settings from the information specified in the .physics3.json file.
CubismExp3Json
This is a class for working with .exp3.json files in Unreal Editor.
You can retrieve facial expression variations and fade settings from the information specified in the .exp3.json file.
CubismPose3Json
This is a class for working with .pose3.json files in Unreal Editor.
You can retrieve the settings that control the display status of parts from the information specified in the .pose3.json file.
CubismDisplayInfo3Json
This is a class for working with .cdi3.json files in Unreal Editor.
The .cdi3.json file contains the names of the parameters, parts, and parameter groups configured in Cubism Editor, along with their corresponding IDs.
In the Cubism SDK for Unreal Engine, this file is used to display the names of parameters and parts in the parameter operation window accessible via the Cubism Model Parameter Controller.
If the model does not have a .cdi3.json, the ID will be displayed.