I build the hull and use a subdivision surface modifier. I know that if I want to sharpen an angle on the outside, to use Shift + E.
But how can I sharpen that angle so that is inward? As you can see in the picture, there is a curve. I have tried but can't find a solution.
I would like to remove the curve in the picture and turn it into an angle. I am grateful if anyone can tell me how to do it!