How to exceed the card size limit

A question for the map makers: How do you make the 15x15 size?

With vanilla map editor you can't - the game enforces arbitrary limit of 64km^2 as a hardcoded max area, even though the actual game engine supports maps 4 times larger than vanilla (16x16) by area, but it needs a mod to remove this custom limitation. The 16x16 limit is much harder to overcome due to how code is done under the hood.

I guess they put it for performance reasons for weaker hardware.

I have managed to vibe code such mod and i am creating 16x16 map. Can share if you like.

The Map Editor does not have an option you can select to get the 15x15 map size.

Although there is a work around:

You can download the following map in the Maps Hub:

https://coigame.com/Map/192/Blank-7424x7424-Map-55M-Tiles

This is a blank 15x15 map.

Open it in the Map Editor and add some land and at least one Starting Point and publish to your computer with a new name (so you can reuse the blank one at a later time).

Then you can go in and add more terrain to your hearts content.

Here is an example of one I am creating right now

(I will publish in a few weeks after a few tweeks and testing):

Warning: I have heard rumors that such a large map may slow down games with weak computer hardware.

Maps of this size cause a lot of inexplicable crashes and bugs. I tried many times and decided to give up.

I haven't had problems so far...but I have only been using this map for about 12 RT hours of play in Sandbox mode.

I probably might not know until I start to REALLY build up my industries and other things. 🤷

I know about 3000+ people have downloaded the Evi-U4-unlimed map:

https://coigame.com/Map/388/Evi-U4-unlimed-2026v2-map

That is a 15x15 map and have not seen any bad comments on it yet.