Add an option to only process part of the world (to avoid PNG limits etc)

[ynleborg]

I have a huge world. Generating the whole map takes hours. Is it possible to generate a smaller part? There is a parameter with coordinates (schematic-get) but there is no information on how to use it.

[Valacarnage]

Being able to generate a smaller part of the map, or specific chunks, and being able to upload those over an existing map would help a lot for larger worlds. A full map gen on my current world is a 2.4 gb in size. being able to generate a subsection and upload those images would make updates much faster and easier.