Keep surfaces aligned by using the "Zebra" view to check for fairing issues.
You'll see a box-like shape with:
DELFTship uses a approach. Unlike traditional CAD, you move a sparse network of points to influence a smooth, high-resolution surface. DELFTship (Free version) Delftship Tutorial Pdf
If you cannot access the official portal, several maritime communities host archived tutorial PDFs and step-by-step forum guides: DELFTship (Free version) Keep surfaces aligned by using the "Zebra" view