 So you don't understand curved islands, not a problem. If you click on a face that is in the middle of a surface, it's gonna act just like you were targeting a single poly. But if you click on a face next to an edge, it will apply the action to all faces touching that edge. So this is what it looks like in the middle of a surface. This is what it looks like when you apply it to something on the edge. Hope that helps, and as always, I hope you have a fantastic day, and I'll see you around.