Mio3 UV
UV Edit Assistant Tools.
An easy-to-use, user-friendly UV editing support add-on for everyone from beginners to professionals, designed to make UV unwrapping more enjoyable. It includes features particularly suited for character modeling.
To preview all the features currently implemented, please refer to the documentation page.
Documentation English / Japanese
Mio3 UV Ver 2 supports Blender 5 and later. Please use Ver 1.5 with Blender 4.
🐻 Location
UV Image Editor > Sidebar > Mio3
❓️FAQ
The add-on does not appear in the sidebar.
The tool window for this add-on is displayed in the UV Editor, not the 3D Viewport. Please make sure you have selected an object that can be UV edited.
Installation failed / Cannot install the add-on.
There may be a compatibility issue between your version of Blender and the add-on. Please check and ensure you are using the correct versions.
🔧 Features
Unwrap
- Unwrap: Unwrap while maintaining the original position, size, and angle as much as possible
- Straight: Unwrap so that the selected edge loop becomes a straight line
- Normalize: Normalize the size and position of selected UVs
- Gridify: Unwrap so that the selected face becomes a rectangle. Can be used for quadrilateral meshes
- Rectify: Unwrap so that the boundary becomes a rectangle
- Projection Unwrap: Unwrap by projecting from an angle parallel to the normal of the face selected in the 3D view
Align
- Align: Align selected elements to the top, bottom, left, right, or XY center position
- Align Vertical/Horizontal Edges Only: Align edge loops only in vertical or horizontal directions
- Align Axis: Adjust to be vertical to the X or Y axis.
- Orient World: Align the angle of the island to the Z axis
- Sort: Sort islands based on coordinates in 3D space
- Distribute: Distribute islands evenly / Distribute UVs based on geometry/equalize edge length(v1.3)
Vertices
- Relax: Smooth selected vertices
- Stack: Stack similar islands
- Merge: Merge nearby UVs in the selection
- Circle: Adjust to form a clean circle
- Offset Boundary: Expand or shrink the boundary UVs of the island
- Align Seams: Align UV coordinates with the same 3D vertex that are separated by seams
- Stretch: Align the width of islands or UV groups (v1.3)
- Copy & Paste UV Shape: Copy and paste the shape while maintaining the original position
- Shuffle: Randomly rearrange island positions. If two islands are selected, exchange their positions
- Unfoldify: Automatically layout selected islands based on their spatial relationships in 3D space
- Average Island Scales: Adjust size based on the mesh size in 3D space
- Align Body Parts: Identify body parts based on coordinates and align orientation and order for intuitive layout
Islands
- Unfoldify: Automatically layout selected islands based on their spatial relationships in 3D space
- Align Body Parts: Identify body parts based on coordinates and align orientation and order for intuitive layout
Symmetry
- Symmetry: Symmetrize UVs based on 3D space symmetry
- Snap to Symmetry: Snap to the closest symmetrical UV
Selection
- Select One Direction: Select UVs on one side based on coordinates in 3D space
- Mirror Selection: Select symmetrical UVs based on coordinates in 3D space
- Similar: Select similar islands
- Boundary: Select island boundaries
- Select Vertical/Horizontal Edges Only
- No Region: Select UVs that do not have an area
- Flipped UV Faces: Select Flipped UVs
Mark Seams
- Mark Seams Angle-Based
- Mark Seams on Selection Boundary
Utils
- Original Checker Map Use a cute original checkered map. (using Geometry Nodes)
- Padding Overlay Display padding overlay
- UV to Mesh: Set up a modifier for UV to Mesh. (using Geometry Nodes)(v1.2)
- Exposure Adjustment: Adjust the exposure of the texture when the UV mesh is difficult to see.(v1.2)
🐧 Add-ons That Are Convenient to Use Together
Texel Density Checker
https://extensions.blender.org/add-ons/texel-density-checker/
📝 Issue Reporting
If you happen to encounter any issues, we would appreciate it if you could report them via Issues instead of reviews.
What's New
2.1.0 April 8th, 2026
Fix
- Pin: Fixed an issue where the operator could not be used.
- Circle: Fixed an error that occurred when using the Composite Edges option.
Update
- Texel Density Tool: Added tools for texel density extraction, application, and UV coverage calculation. (Documentation)
- Unwrap: Improved precision of in-place unwrap. Attributes to preserve can now be selected individually.
- Normal Projection Unwrap: Now available from the UV Editor, not just the 3D View.
- Align: Added Top-Left, Top-Right, Bottom-Left, and Bottom-Right options. You can now choose the alignment reference from Bounding Box, UV Area, or 2D Cursor. In vertex mode, using the Center icon now aligns vertices along a straight line. Improved processing.
- Sort: Added guide features in 3D space (single-axis, radial).
- Symmetrize: Added an "Auto" option that prioritizes the selected side. You can now also set a fallback direction in the add-on preferences when detection is not possible.
- Snap: Added quadrant symmetry option. Improved processing.
- Relax: Improved processing. Now runs even when only vertices are selected, regardless of boundary pinning.
- Padding: Added an option to automatically calculate optimal padding based on texture size. Improved the accuracy of rendered lines.
- Checker Map: Automatically switches the viewport to shader display mode after use
- UI: Adjusted icons and layout, and fixed typos.
Very useful! Thank you!