UV Checker

This panel contains tools to check the state of UVs on the model, visually and technically.

Checker Texture Alt+T

Add/Remove Checker Texture to/from the mesh.

Checker Preferences

Preferences
Checker Library Folder	Checker Library Folder indicates the folder with which Zen UV Checker will work. All textures in * .JPG, * .PNG formats that are inside this folder will be collected in Checker Textures list and can be used to display on selected models.
Reset Folder	Reset Checker Library path to Default State.
Load Your Texture	Open File Browser and add the selected texture to the Checker Library.
Refresh Texture Library	Refresh Textures from Checker Library Folder.
Auto Sync Checker	Automatically sync selected Checker Texture with Viewport.
Open Shader Editor	Open Shader Editor with Zen UV Checker Node.
Reset Checker	Reset Zen UV Checker to Default state.

Operator mechanism

Checker Texture Toggle is adding/removing Zen UV Checker Node on/from top of your materials in Shader Editor. Your materials are safe!

Remove Checker Nodes

Remove Zen UV Checker Nodes from all the scene materials.

Checker Textures Selector

1. Interpolation 

Switch texture interpolation in the Checker Node between Linear and Closest.

2. Checker Textures

The Checker Textures field is used to select the checker texture that will be displayed on the selected models. It contains full list of default textures.

Any texture can be tiled or offset but only in the Material Preview or Rendered modes.

Every texture has an bright green pixel in U = 0, V = 0 coordinates. If you see green faces - keep in mind that they do not have UV coordinates.

3. Filter 

Enable resolution fields to filter existing textures by X or/and Y resolutions. Includes a Lock button for filtering square format textures.

Includes an “O” button for activating Orient Checker texture. Screenshot when Orient filtering is on.

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Display

All useful for checking UVs Draw operators and their settings.

Blender Draw System

Display
Crease	Display Creases created for Subdivision Surface modifier.
Sharp	Display Sharp Edges.
Bevel	Display Weights created for Bevel modifier.
Seams	Display Seams.

Zen UV Draw System

Finished

Display and Select Finished Islands. You can read more about Finishing System here.

Flipped

Display and Select Flipped Islands.

Stretched

Display an angle-based stretching map.

Excluded

Display and Select Islands Excluded from Packing.

Overlapped

Display and Select Islands Excluded from Packing.

UV No Sync

Display in 3D Viewport faces selected in UV Editor when UV Sync is Off.

Seams

Display Seams in UV Editor.

UV Borders

Display UV Borders (Margin) in UV Editor and 3D Viewport. Line width depends on Margin and Texture Size from Pack panel.

UV Object

Display UVs in Object mode without entering Edit mode.

Stacks

Zen UV Draw System Preferences (Edit Mode)

Options
Overlay Sync	Draw is synchronised with Overlay On-Off settings.
Auto Update Draw	Update draw cache every time when mesh is changed.
Auto Disable Draw	Switch draw system off when object mode (Edit, Object) is changed.
Scale Points on Zoom	Scale Points when zoom is changed.
	—
Scale Points Ratio	Scale ratio when Point size is changed in UV Area.
Finished Color	Finished Islands Viewport Display color.
Unfinished Color	Unfinished Islands Viewport Display color.
Flipped Color	Flipped Islands Display color.
Excluded Color	Excluded Islands Display color.
Overlapped Color	Overlapped Islands Display color.
UV No Sync Color	Display color for selected Islands in UV No Sync mode.
Font Size	Font size for Drawing labels.
Font Color	Font color for Drawing labels.
	—
TD Gradient Width	TD Gradient widget Width.
TD Gradient Height	TD Gradient widget Height.
TD Color Alpha	TD Color widget Alpha.
Draw TD Mode	Draw TD Mode, combination of gradient and viewport.
	—
UV Borders Color	UV Borders Display color.
UV Borders Mode	Modes of UV Borders Display color.

Zen UV Draw System Preferences (Object Mode)

Options
Overlay Sync	Draw is synchronised with Overlay On-Off settings.
Auto Update Draw	Update draw cache every time when mesh is changed.
Auto Disable Draw	Switch draw system off when object mode (Edit, Object) is changed.
Scale Points on Zoom	Scale Points when zoom is changed.
Scale Points Ratio	Scale ratio when Point size is changed in UV Area.
Display UV Object Vertices	Show vertices in UV Object mode.
	UV Object Active
Fill Color	Active object UVs fill color.
Vertex Color	Active object UVs vertex color.
	UV Object Inctive
Fill Color	Selected object UVs fill color
Vertex Color	Selected object UVs vertex color.
Font Size	Font size for Drawing labels.
Font Color	Font color for Drawing labels.

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How to set hotkey to specific draw mode

1. Right click on desired draw mode

1. Assign hotkey
2. Find hotkey in the list of hotkeys
3. Copy context attribute path to the clipboard

1. Change operator name to wm.context_toggle_enum
2. Paste context attribute from the clipboard
3. Set 1 enum value to desired mode and set 2 enum value to NONE.

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Tools

Tools for analyzing and finding Mesh errors that can negatively affect UV operations.

Elements by Index

Select elements by their indices.

Zero Area Faces

Select faces with Zero UV area.

Edges Without Faces

Select edges without faces.

Edges with multiple loops

Select edges with Multiple Loops.

Empty objects

Select objects that don’t contain faces.

Doubled Vertices

Select vertices that have the same coordinates.

UV Islands Counter

Count UV Islands of selected objects and display the result.

Clear Attributes

Clear mesh attributes used in Zen UV. Finished and Excluded.