BE CAREFUL - WORK FOR SOME CHUNKS BUT NOT FOR OTHERS WHER IT FUCKS UP LIQUIDS
This is an old tool i made in 2015 and never realy used.
You can edit and fine tune water on adts, chunk by chunk, subchunk by subchunk (8x8 water map on every chunk), set transparency, type, height, etc etc.
Idk if it's useful at all nowadays, there is probably another tool for that released years ago.
Tested on 3.3.5 adts (v18), it will probably not work for other versions.
Usage example :
