Unjoining joined sectors?

[smeghammer]

Hi all, I just discovered I have two separate areas on my map that are in fact the same sector:

 

 

I have no idea how this happened 'cos the room and the corridor were built separately... Anyway, I want to un-join these. If I use 'disconnect' it removes both from the geometry, rather than un-joining the merged sector. 

 

Basically, what I want to do is perform an 'un-merge' so the two areas of - currently - the same sector become two independent sectors again. Note also there are 3D floors above these. 

 

Any ideas?

 

[Nevander]

In Doom Builder editors, you can use Make Sector tool on one or both sectors you want to un-join.

Edited August 17, 2020 by Nevander

[smeghammer]

That's neat! Thanks.