Weird texture issue I can't find anything on

[Syn]

A strange texture bug has appeared in my map and I have no idea what caused it or how to fix it. 

 

It occurred after adding a MAPINFO file to the WAD via Slade...now this texture is stuck in my sky (shared one of the textures of my exit teleporter, on the OTHER side of the map) and ever weirder, it's solid. It's freezing my Cacodemons dammit.

 

I'm using Ultimate Doom Builder in the GZDoom: Doom 2 (Doom Format) format. Any help would be VERY appreciated. I'm also up to provide more screenshots and info if needed.

 

 

[Doomkid]

Looks like some control sector for a 3D floor is being applied to the entire map - how bizarre! If you're willing to share the file it would help greatly in diagnosing the problem.

[Syn]

For sure. Diagnose away!

TNTX.zip

[Gez]

4 hours ago, SynDoom said:

It occurred after adding a MAPINFO file to the WAD via Slade...now this texture is stuck in my sky (shared one of the textures of my exit teleporter, on the OTHER side of the map) and ever weirder, it's solid. It's freezing my Cacodemons dammit.

You are using a 3D floor special all around the BFALL column on your exit teleporter.

 

I suppose you wanted to use line type 412 (translucent line) like on the SFALL column of your normal teleporter, but you used line type 416 instead. So they apply a 3D floor (solid, 40% opaque) from your exit sector to all sectors tagged 0...

[Syn]

Oh my god...no idea how I missed that. I feel slightly embarrassed.

 

But seriously, me and my cacodemons thank you.