Black Box - Glitch Or Easter egg?

[Koopinator]

Hey guys, i noticed something weird: A flashing black box in x: -100000 and y: -100000.
I did not add this.
ScreenShot:



Yes sorry i did not put my mouse at exactly x: -100000 y: -100000, but it pretty darn close
Does this happen with anyone else?

Details:

Spoiler: show

This black box cannot be removed, thus it is not a background, when an NPC is placed on it, it goes behind it, but it is still there, as indicated by the erase noise when using an eraser at its spot.
It also flashes like an invisible block.
It has not been tested in the player mode. (the one from f5)

[Squishy Rex]

It is neither actually. That is just another section of the level, but it gets blacked out while you are not editing that section. You can read more about this here:http://engine.wohlnet.ru/docs/_SMBX64/Level%20map.pdf

[bossedit8]

Yeah, that black box after you go straight diagonally down-right, you get to another section of the main Level and it goes on until the 21th section. Make sure that it doesn't connect to eachother while expanding 1 section and then accrossing another one or else tiles can be visible seen on both section... although it might be Handy at some Point, it's just a warning.

[MECHDRAGON777]

Yeah, that black box after you go straight diagonally down-right, you get to another section of the main Level and it goes on until the 21th section. Make sure that it doesn't connect to each other while expanding 1 section and then accrossing another one or else tiles can be visible seen on both section... although it might be Handy at some Point, it's just a warning.

I thought I discovered this a few years ago and I actually use this in my levels! I abused this in my CC6 level actual! Good way to split a section in half! I knoe Tower of Bias 5 is my worst level, but still!