Incorrect rendering of middle textures
Odamex 0.8.0 currently has a bug that makes middle textures render with an offset. It looks like it's rendered 1 pixel lower than intended.
To better check the issue, set vid_320x200 to 1, and check the middle texture in the slime secret of MAP01, or check it here :
This can also be seen in OdaCTF :
Created attachment 578 [details]
Doom 2 map11 Rendering bug
you can see the line that unintentionally reveals the soulsphere secret