1. I end one map with a fade-to-black
2. I want to start the next map from the fade-to black point. [No matter how much I try, I can't get the map to start from complete blackness. Therefore, I've resorted to the method in Item 3, below. And, no, it's not an option to set all sectors visible at the start to 0 light level.]
3. The player starts in a dummy sector consisting of black flats/textures and 0 light level (i.e., complete blackness).
4. After a brief HUD message, the start of music, and a small delay, the player needs to be teleported to the true start of the map.
5. Upon teleporting to the "true" start, the game fades out of black, and the player can commence playing.
Unfortunately, the teleport part of the instruction [refer to scripts below] is not working. I vaguely recall that I was trying to do something similar many years ago. At that time I believe I had to resort to a scrolling floor, a blocking line that was changed to non-blocking at the correct moment, and the player being carried by the scrolling floor across a teleporting line. Hacky, I know, which is why I was wondering if there is a more elegant way of achieving my objective. Thanks.
[And, yes, there is a map-spot with TID 10, and it's in a sector with tag = 40. I've tried it with both a map-spot and a teleport destination thing.]
Spoiler: