B1892 Regression in map resolution

[arbiter787]

The resolution of map layers was massively improved in B1852, but it seems to have regressed back to B1825 levels sometime between B1868 and B1892 (the last version I played was B1859, which didn't have this issue).

I should have taken comparison screenshots when my game was still on B1859, but the change in clarity should be immediately apparent upon downgrading the game to that version.

[Dide]

Same...