Thanks! The default "basemap" style is ported from OpenMapTiles v3.12.2.

That's great to hear. I'd love to create some vector tiles with building and building height data on zoom levels down to 11. Is this the correct place to perform this change? https://github.com/onthegomap/flatmap/blob/e402a3333bc5127e5...

Or could I even achieve this via the config file? https://github.com/onthegomap/flatmap/blob/main/config-examp...

Yep, that first one will do it! And you probably want to rip out the polygon merging code and minimum zoom on the attrs. You can use --only-layers= or --exclude-layers= if you don't want all the others.