At first I thought this would be impossible, but from what I understad, you have access to the source code. If that's not the case, then I won't bother pushing this.

In any case, while I get the idea behind having a round map, I never thought it worked well in Medieval Engineers. The map simply isn't big enough for the curvature to feel natural. It always looks like I am standing on the top of a mountain due to the short view. And have you ever built across the grid? It gets weird...

As humans, we're used to a planet whose circumference is 40,000 km. The radius of the ingame planet is approximately 10 km, which makes the circumference 63 km. That is the exact distance between the top of the Eiffel Tower and the horizon.

Other than that, the map is great. I like the diversity, and it's more than big enough to play around in.