modelling a car, it is very important to be able to make "clean"
fillets, or creases.
Lets explore a few different ways to make nice "semi"
Start this excersize by making a rectangle, delete one of the corner points,
and make a fillet on the other corner:
Next lets try to replicate this curvature with a nurms surface, I have
found that you easily can get "away" with a 3 point setup on
the smallest fillets.
It is not as accurate as using 4 points, but it will not be noticable
in most cases:
For bigger fillets it can be nessesary to use more points, thus avoiding
visible "edges" after subdivision.
Using 4 pointe also gives you a more accurate fillet.
This can be useful in those situation where you want higher accuracy:
It is important to practice the techniques of this
page and the former, because they are essential for modelling a nurms