My one and only BUILD discovery, is the drill. It is similar to the Piston, but at the same time, completely different. Play DRILL.MAP to see it in action. I have no idea why 3DRealms took this effect out of the game, because I have encountered absolutely zero bugs while playing the game with it (actually, there was a minor graphic problem where a tiny chunk of the explosions would show through the floor on one side of the drill, but it was hardly noticeable). They did include the effect in their game "Shadow Warrior" which was released after Duke Nukem 3D. The drill is simple: it goes into the ground slowly, then it shoots back up causing explosions and debris, and repeats. The drill I created in DRILL.MAP however, is not that simple. I added rotating sectors which create the metal drill head.
Create the Drill sector.
Place the following sprites in the Drill sector: S[0,35]
(Sp[0,Speed]).
Now the Drill will work in the game! It will lower into the ground, then shoot back up with explosions and debris as shown below:
Notes (excerpt from my modified SE Reference which is included with this tutorial) :