Platform/Elevator like the one in Thunderpeak

[KingShinra]

(For the Record, Vader, if you're reading this, Thunderpeak gave me the impetus to learn how to map at that detail level. Thank you sir)

Now, my question revolves around this:

The main elevator in the center room. You press the button, you go down about 512 vectors, then you silent teleport/portal/move to another sector, whilst riding the elevator, into the sublevel.

In other words, one sector goes down, and you end up in another sector as the arrival point.

I've seen the same effect being used as a illusion for the illusion of going downstairs in the same general area, dropping down a pit into the underground, or just creating an illusion that you're going down one sector, and ending up in another that cant logically fit in the intended sector

(Also for the record, I've mastered 3D flooring).


Question: How would I go about making that transition. Tried looking on the wiki, but couldn't understand it.

[KingShinra]

Le Bump.

[Kappes Buur]

Map01 ?
Map02 ?
at what coordinates ?