>>44515894Inpaint is very powerful because it can take in the entire image as reference to try and maintain style while altering stuff.
In this case, what he actually did was take the first image into Paint or similar software, select the legs with lasso or box selection, then just widen them, fill in the gaps with brush, and then import into Inpaint, mask the legs, and generate, probably a few times to get it just right.
At least that's how I've been generating some of my "finished" way-too-damn-thick pieces.