Which is more difficult, ug forward modeling or reverse modeling?

Ug forward modeling is not as difficult as reverse modeling. If you use reverse modeling, you won't make so many holes in one surface. You have to divide yourself, make noodles separately, and then consider contact. However, the points of reverse modeling often have errors, so it is not necessarily appropriate to use them directly. You need to process points, construct a smooth curve, and then make a surface. Ug forward modeling steps are not so complicated. So ug forward modeling is not as difficult as reverse modeling.