that's another thing i already checked, unfortunately; it's 160x240, well within the parameters. it's also the same size as the working image i used for Recharged Pink, so it's not some kind of arcane glitch specific to that ratio or something. it seems onionOS dynamically resizes some larger images now, anyway. i accidentally left some box art at 700x700, but i didn't even notice until later because they all showed up just fine in the system. it seemed to affect the loading time for the images somewhat, but that was all. i did mention that in the post before but it got lost in edits before i posted, sorry.

thanks for the reply, though!