If anybody thinks that the level design is not on par with the other Duke3D add-ons (*looks at NightFright*), check out this screenshot of the third level.
NWL3B1.jpg
That is a sprite bridge. But not just any sprite bridge. Most sprite bridges just have one flat sprite, giving the illusion of a 2-D plane. This one is a 3-D sprite bridge. Here is a screenshot of it with all the sprites deleted:
NWL3B2.jpg
See what I mean?