There's also a settings menu that lets you customize the homescreen grid and install custom icon packs, or choose from the three packs offered by OnePlus (rounded or
square icon masks, essentially).
Not exact matches
Nova Launcher uses the same method behind their color - matching notification badges to tint the background of legacy
icons to better match their
icons, and for some large
square icons, Nova will simply enlarge the
icon to fill the Adaptive
icon mask entirely.
Developers can now provide Google perfectly
square icons that then the various OEMs can customize and apply a certain
mask, so as to change the shape of the
icon.