overlap or else it's so easy to get the well which branches like to the ref to the right just by looking at the boundary pixels so that's one obvious but but but highly non-trivial at the time but considered obvious now so you make sure that the patches don't overlap second thing is you jitter you jitter the patches to prevent chromatic aberration so so that the but by that what I mean is you you sample you basically you you sample a particular random crop view you can you divide it into three by three grid of patches and