Blender 3D add-on for quick and easy materials overrides in the EEVEE render engine.
"EEVEE Materials Override" add-on allows you to quickly assigning the single material to all objects in the scene, for example, for clay renders or the UV-grid demonstration just in a single button click.
You can use two built-in templates: "Clay"
and the "UV Grid".
You can also assign your custom material to all scene objects.
Overriding materials can be disabled or enabled at any time.
The add-on is for the "EEVEE" render engine but also works with the "Cycles" render engine.
For Blender versions
“3D Viewport” window – N-panel – the “Override” tab
Current add-on version