Yeah it is not in-game view as then it would still show up when testing the map. But did check that anyway :P
Was in a bit of a hurry when I posted this but have made some more troubleshooting.
New melee maps show fog fine. New arcade maps with my mod dependency show fog fine.
Still, all my maps that use the mod from before no longer work (fog).
Could a bank possibly cause it? not saving any fog data but still, will have to check when I can.
This is getting a bit annoying, now all maps except 1 work and i have not realy done anything :/ Well it is progress atleast, albeit unintended :)
Issue solved, the map with the issue was previously using an outdated tileset and has apparently changed it to the current one, so when i changed the settings on the valid tileset it now acts accordingly.
Stupid editor changing things without giving me a hint :D