This Blender add-on offers several customizable 3D Viewport and UV Editor overlays for visualizing common issues in UV Maps, like UV Streching, Flipping, and Overlapping. The addon is accessible from a panel in the tools section of the 3D Viewport and the UV Editor.
You need Blender of version at least 3.5.
This is the list of the main features offered by this add-on.
Overlay for previewing image textures with just one click. The default Grid texture can be switched to any other image loaded in your workspace. You can change the scale and alpha of the texture. This overlay can be combined with all other VisualUV's overlays
This overlay works similarly to Blender's default UV Stretching Visualization but is also displayed on the original model in the 3D Viewport. You can choose between visualizing stretching of faces by angles, areas and edge length.
This overlay colors the UV Faces depending on the direction of their normals.
This overlay uses Blender's feature for selecting overlapping UVs, but additionally colors them both in the UV Editor and the 3D Viewport.
This feature is only available in the Edit-Mode and with Synchronized UV Selection turned-off.
This feature needs to be manualy refreshed to visualize correct information.
Overlay for coloring each UV Island with a distinct color.
After turning on any VisualUV overlay, you will be get access to several customization options.
VisualUV by default refreshes after every button release and mouse click. Working with models of thousands of polygons can become unpleasant, with constant stuttering as VisualUV recalculates visual information about the geometry. The Auto-Update feature can be turned off, and all overlays can be refreshed manualy be a designated button. The Refresh button also serves as a quick restart, as some operations in Blender may internaly crash the overlays.
A wireframe shader is turned on by default and is visible in Edit-Mode.
Turning off this option boost performance.
Turning on these options let's you modify the position and colors of the overlay.
This feature will let you divide the overlay into individual UV Islands and allowing you to offset them away from the center.
