Much like how an unknown type overrides an unidentified item's name and description with the unknown type's, it should do the same for images if the unknown type has an image.

Hypothetical examples:

• Unknown auton type has image of AutoSentinel while known autons had various images. Autons that are unidentified use the unknown auton's AutoSentinel instead of other autons' images of 300D, 1M, Mule, Luminere battle auton, etc.
• Known barrels have various shapes, sizes, and markings while unknown barrels have the generic blank barrel.

The idea is to reduce meta-gaming an item's identity by memorizing a particular item's image and recognizing it on sight despite reading unknown item text.