Also, I cannot run MGS V at higher than High settings without completely murdering my frame rate, so the quality of these won't excede that.
If you are only taking screen shots, what does the frame rate matter? Just kick it up while doing your 'photos', then reduce it back down when you want to play seriously... no?
I concur about thumbnails...
If you get more ambitious, animated backgrounds are always cool, as are ones with characters in them...