you go export -> pack settings, say you want to export project to 2 sizes (one full, one half), so you play with output-> scale, set 1 for full and 0.5 for half, click ok go back to export setting and then export, after this, you'll have one json, two atlas files with 2 pngs for each atlas, now things are getting confusing, I suppose the atlas file contains different size info, but two atlas files are actual identical (except the file name), I'm doing this from an artist point of view, so I don't know exactly what goes under the hood when dealing with runtime, but what tells that you have two export version that has different size to each, I had a look at json file but it's too messy to make any sense to me, am I missing anything when exporting project into different size, or what's the proper way of doing so?