Release Notes 1.3.0

1.3.0 (2026-08-14)

• New Features
  • Added the Parametric Shape feature. (Beta)
    • Creation
      • Can be created by selecting right-click on the New button in the Scene toolbar ??Parametric Shape (Beta). From then on, the New button remembers the creation mode last selected.
      • Can also be created through the global function shortcut UModeler X/GameObject/Create Parametric Shape. (No default shortcut assigned.)
      • If an object is selected, it is created as a child of that object; in Prefab Stage, it is created as a child of the stage root.
      • Immediately after creation it enters Draw mode, so a shape can be drawn right away by dragging in an empty area of the scene.
      • Only one shape can be created per object.
      • Supports a total of 22 shape types.
      • Layout is a non-rendered reference box that can be used as the anchor reference for child shapes. It is displayed as a wire box in the Scene view.
    • Scene View Editing
      • The three modes Draw / Edit / Object can be switched from the Scene toolbar or by shortcut. (Default shortcuts: Shift+2 / Shift+3 / Shift+4)
        • Draw: Draws a new shape by dragging in an empty area. Available only in a single-selection state, and after drawing once it automatically switches to Edit mode.
        • Edit: Displays the handles for adjusting parameters.
        • Object: Hides the handles and uses only Unity Transform manipulation.
    • Editable Mesh Conversion
      • Convert to Editable Mesh can be used to convert a shape into a mesh that can be edited directly in UModeler X.
      • Rather than converting baked triangles, the EdMesh is regenerated directly from the parameters, so quads, UVs, and topology are preserved.
      • Once the conversion is complete, the parametric component is removed. This behavior prevents manual edits from being overwritten by parameter changes.
      • Layout has no mesh, so it is excluded from conversion, and Collider Mode is automatically turned off upon conversion.
    • MCP Integration
      • Through integration with MCP, shapes can be created and placed in the scene using a DSL script for parametric shapes.
      • Provided tools:
        • umx_parametric_shape: Shape creation and editing
        • umx_hotspot: Hotspot layout creation and editing
      • Supported MCP frameworks:
        • Coplay
        • Unity-MCP (IvanMurzak)
        • UnityMCP
        • AI Assistant
      • Key DSL Syntax
        • Objects are created in the form <kind> "name" k=v ..., with parent-child relationships composed using 2-space indentation.
        • @x,y,z: Position
        • rot=: Rotation
        • sc=: Scale
        • pivot=: Mesh origin
        • anchor=: Fixing based on the parent bounds
        • offset=: Offset
        • ratio=: Ratio
        • meshrot=: Mesh rotation
        • pts= / wts=: Control points and NURBS weights (NURBS / Quad Strip / N-gon / FFD)
        • mod <type> k=v: Adds a modifier
        • prefab: Places a prefab
        • save prefab: Saves a prefab
        • del: Deletes
        • @"name": Edits an existing object
        • #id: Specifies an object with a duplicate name unambiguously (editor session only)
        • Lines beginning with # are treated as comments.
      • If even a single error is found during the static check stages consisting of parsing, validation, and preflight, execution is blocked without making any changes to the scene.
    • AI Shape Script Window
      • Added a window where DSL scripts generated by conversational AI such as ChatGPT or Claude can be pasted and executed, even without using MCP.
      • It can be opened from the following menus:
        • Window > UModeler X > AI Shape Script (Window)
        • Tools > UModeler X > Windows > AI Shape Script
      • The basic workflow is Copy Prompt ??request the desired shape from the AI ??Paste the result ??Run.
        • Copy Prompt: Copies the latest DSL syntax guide to the clipboard. Since it uses the same source as the MCP tool descriptions, the latest syntax is always reflected.
        • Paste: Pastes while automatically cleaning up code fences, tabs, quotation marks, and the like.
        • Validate: Checks only the validity of the script without modifying the scene.
        • Run: Applies the script to the currently open scene. The execution of the entire script is handled as a single Undo step.
      • After execution, the number of created, modified, and deleted items and modifiers, along with the list of failures and warnings, can be checked at the bottom of the window.
• Improvements
  • General
    • The New buttons in the Scene toolbar have been changed into combo buttons for selecting the object type.
      • Left-click: Immediately creates an object of the currently selected type.
      • Left-click and hold (or drag slightly): The type menu opens, and sweeping across it and releasing the mouse creates an object of that type.
      • Right-click: Menu for selecting the type to create (Editable Mesh / Curve Object / Parametric Shape (Beta))
  • Modeling Mode
    • Replaced the internal commands of the following tools with new commands.
      • Modeling Mode
        • Duplicate Tool
        • Extrude drag of the Element Tool
        • Mirror Tool
        • Follow Tool
      • UV Editor
        • UV Detach Tool
        • Sew Tool
        • Move Sew Tool
        • UV Weld Tool
        • Loop Select Tool
        • Shared Select Tool
        • Slice Cut Tool
        • Eraser Tool
      • Existing behavior and results are maintained, while element creation and deletion handling has been unified to improve stability.
    • Element Tool
      • Added selection modes to Soft Selection.
        • Distance: Calculates the Soft Selection range based on absolute distance.
        • Connected: Targets only elements connected to the currently selected mesh and calculates the Soft Selection range based on absolute distance.
        • MeshDistance: Targets only elements connected to the currently selected mesh and calculates the Soft Selection range based on the accumulated distance of connected edges.
• Bug Fixes
  • General
    • Fixed an issue where the UModeler X bug reporting UI was displayed even for bugs unrelated to UModeler X.
    • Fixed the Preferences > UModeler X > SaveData path so that it is automatically updated when the UModeler X Data folder is moved in a UModeler project.
    • Fixed an issue where Unity's custom shortcut profile was not restored properly.
  • Modeling Mode
    • Bevel Tool: Fixed an issue where some vertices protruded when Segments was 2.
  • UV Editor
    • Fixed an issue where changes were not refreshed immediately after unpacking a prefab instance.
    • Auto Layout Tool: Fixed an issue where UVs became scrambled when meshes were flipped relative to each other.
  • PicoBerry
    • Fixed an issue where the model picker and the Inspector did not reflect the server's AI model catalog according to its actual state.