Ideally as much as possible should be customizable through JSON. Presets could define all of this, which could then be shared.

This customization would include building rasterization, which would allow people to use custom materials and respond to OSM tags differently.

This change calls for a complete redesign for the customization GUI, which is probably appropriate due to the lack of standards between GUIs. With this, settings should be split off into categories (General, Buildings, Globs...)

The GUI has been redone, however the full customization will not be handled with the first release. This will be implemented along with 1.13 data packs.