...so you wouldn't have to stupidly waste space like this:
I mean, I know it may not be feasible, either on the engine side or to make a nice and easy UI for making metatiles, but look at all those repeats. The main ground block could be used for something different as it repeats several times over, as would single-(meta)tile shores since they're basically copies of sides of shore corners. Not to mention it would be easier to update graphics if you decide to change visuals.
Just a nitpick, really.
I mean, I know it may not be feasible, either on the engine side or to make a nice and easy UI for making metatiles, but look at all those repeats. The main ground block could be used for something different as it repeats several times over, as would single-(meta)tile shores since they're basically copies of sides of shore corners. Not to mention it would be easier to update graphics if you decide to change visuals.
Just a nitpick, really.