Left Toolbar > Mesh Nodes > Scene Material
The Scene Material node defines the material to be rendered in the Model Viewport, and takes as input the material in the graph that will be used as the textures of the model.
Material in the Model Viewport
On the left toolbar choose Material Nodes > Scene Material. >
Drag the Scene Material icon into the Node Graph.
Connect the input material into the input socket of the Scenes Material node.
Open the Scenes Viewport. (View > Show Scenes Viewport)
The material of the model.
The albedo texture of the model.
The normal texture of the model.
The roughness texture of the model.
The metalness texture of the model.
The occlusion texture of the model.
The diffuse texture of the model.
The specular texture of the model.
The glossiness texture of the model.