Material
Here you can customize the material previews that are displayed in the Material Editor and Attribute Manager.
Defines the size of the preview in the Material Editor, Attribute Manager and Node Editor.
Material Preview
Here you can change which scenes are used to generate the shader preview and material preview.
Defines the scene for the material preview that will be used for the preview (see also
Sets the frame rate for animated previews. The Preview Length is the length of the looped animation preview.
Preview Length (sec) [0..2147483647]
Defines the maximum length of the (looping) animated material preview.
Node-based Materials
Here you can define the size of both previews (Node and Material) in the Attribute Manager of the Node Editor (Preview tab).
Here the scene can be defined for which the Node Materials should be used in the Node Editor (Basic tab).
By default, each Node has its own preview. This can be disabled for newly created Nodes (and enabled at any time at Node level).
Enable the respective scene for the Node/material preview.
Material Manager
Here you can define which material should be created when the New Default Material command is called up or if you double-click on an empty area of the Material Manager.