Thanks Ede. That's a really neat map :)

I've just got the small drain or central channel connecting symbol working properly, but you've reminded me I need a bridge as well as various planks etc.

Ok, so I got a bit side tracked over Christmas, but I did make a connecting symbol. This is a smaller sewer of a fixed 10ft width between the insides of the walls.

Looks a bit boring, but I've got a whole lot of ideas about debris and creatures on the way.

The larger sewer is still in progress, so don't worry. You won't be stuck drawing everything in 10 ft tubes.

Oh Remy's video is just as good, but you would have found my timestamp a bit confusing ;)

You get an awesome for that mammoth task :)

The reversal of land and sea only happened because I wanted to be able to use very soft wide blends between colours on the land without having to obey the coastline.

It's actually the way water is usually done in a city map, so think of it as being an extremly large planetary city map.

EDIT: and if you get stuck at all just shout again. Things might not be as simple as I've described, or work the way I imagine they will, but we will get there in the end.