Looking good :)

With the rivers it might be easier to take one at a time and reduce the line width. You can do that using the change properties tool on the left toolbar.

Be quite careful to observe just one river at a time and look at where it really flows. They don't usually split like you have in the south there.

You're correct, Wyvern. I forgot to mention that the DD3 skeletons in the last shot were on a separate sheet underneath the cubes.

Well that's another thing. Most sewers are quite small. There really aren't that many you can just take a casual stroll down. And they tend to be tube shaped because that's the most economic structure to use for a volume of liquid.

Well, yes.

I think there is also another reason that green is used rather than brown. I've got to the point where I need to start adding the... lumpy bits. Where I was starting down the path of making everything a nice brown I realised that the lumpy bits might be a bit offensive in their actual colour. Maybe that is why most artists head for green.

I also modified the cubes after reading a lot of comments here and in the FB Group about how they are practically invisible. I can't make them invisible, but I hope this is an improved representation of them.

The dotty fill is the grey shading. I don't think we have one like that, though I do remember showing a dotty fill on here some considerable time ago. It's not a published fill.

I found it! Wow, that really was a very long time ago. The third one here is probably a possible fill, but use it very small scale so it looks grey. https://forum.profantasy.com/discussion/7039/dotty-fills