Building a fly brain in a computer 8 years ago
I couldn't see whether they have ruled out that ML is clustering based on the image noise and lighting.
I wouldn't be surprised if the same clustering is achieved after masking big/essential chunks of the fly from all the images (for training and testing sets). If indeed the 'imaging features' are the driving weights in clustering, that means the flies should be able to recognize that they are in a different room.