I didn't even want the map to be tinted, haha. I'd rather just not have the weather effect changing the tint of the map tiles at all. I'll be looking into it, because I didn't spend time recolouring some tiles to match the Zozo graphics just so that the rain effect could go and darken them.
There's probably a script of some kind, or I'm sure someone will be able to tell me what to tinker with in the scripts if there isn't one out there.