Game state thumbnail
While not an object type in and of itself, selecting Game state thumbnail from the Create context menu in Novelty will create an Image with the Game state thumbnail trait enabled. That trait overrides the texture with the thumbnail of a saved game, if available.
Fig: Creating a game state thumbnail
Usage
Displaying saved game thumbnails.
Caveats
On some hardware textures will get resized to increments of powers of two (256, 512, ...). This will create blank areas that will only appears when the Image is tiled.