UPDATE:
This background will still be in the pac file, so if anyone wants to use it, and doesn't know how, just tell me and I'll help
If I manage to make it before you do, I'll resize your stage for you, so I can try to make a little fix to the textures to make them smoother, chuy
EDIT:
The file I'm making for the beta release will work as wifi room, final destination, battlefield, newpork and onett, with no rel files needed. It will probably work as more stages, but I've made it for these ones.
Anyway, there are issues with newpork and onett
Onett: There's a strange teleport in the right side of the monotoli building, caused by an onett related collision, probably related with the cars. Moving up the stage could solve this, but there's no time for this now, and I think it's not necessary anyway because of the other options
Newpork: Perfectly playable, it gets dark due to the chimera in newpork, it doesn't appear, but there's still a dark lightin. There's an invisible object which is able to be hit some times, but it isn't annoying for gameplay.
Anyway, use the stage as one of these only if you like them enough. If you don't like newpork, then just use a FD rel file to make it work with no issues on it. Same to Onett.
You can use it as a stgcustom too (wifi room), or even as a battlefield. I don't think anyone is getting Fourside over battlefield, but the option for making it exists.
I fix some minor things like the main antenna (which is black right now) and I release it.