There are a few things that aren't on the right sheet, but I'm not sure which sheet these things should really be on.

For instance, you have what appears to be the landmass on the POLITICAL BORDERS FRONT sheet, which is on top of most of the other stuff - hence everything vanishing.

This is what's on the LAND sheet.

And this is what's on the POLITICAL BORDERS FRONT sheet

If I start moving stuff around between sheets for you that will leave you in an even bigger mess, so I have turned the background to the sea texture and left everything else as it was.

If you want to move things between sheets, like moving the land to the LAND sheet from the POLITICAL BORDERS FRONT sheet, first isolate the POLITICAL BORDERS FRONT sheet by hiding all the rest (that's what is shown in my second screen shot). Then right click the Change Properties button on the left and pick Move to sheet...

Select all the land polygons and hit D for do it, then pick the LAND sheet as the destination.

I've noticed that you appear to have the land polys and a set of identical black outlined polys on the same sheet and layer, so you may have to select by colour or fill to separate them. Select options can be accessed by right clicking when you are asked to make your selection.

It's only the structures I was thinking of doing fish-eye, and not very much at that. Just enough to show what kind of buildings are under those rooftops.

I promise I will do more structures this time around ;)

Would you like it to be similar in colour scheme to Darklands City?

Calibre - you might be able to use the 3 shades of grassland as contours.

In the meantime I've realised there's no escaping the necessity of doing all the textures first. Only that way can I draw the mountains and hills to fit the colour scheme. So here are 3 desert textures.

I'll put a SYMBOLS HILLS sheet in the style for the foothills that uses a bevel to generate them from hand drawn patches of Solid 20 bitmap. But I may also do regular hill symbols.

Less contrast in the deep water now. I was using 'Glow' as the blend mode, but now I've switched to Multiply.

Is it possibly a little flat now I've done that?

I can always adjust it at any time up to publication, but at least we are rid of the cracked mud look now.

Using Count All in the Info menu, you can see there are over 100,000 entities in this drawing. That is because most of the buildings are House entities laid down in Streets. That's fine, but you can expect things to be a little slow.

If you hide the buildings there are only just over 8,000 entities - less than 1/10 of the total. The map also zooms and pans much faster.

So putting different districts on different layers as described in detail by Quenten above, you should find it a lot more maneagable.

I didn't have any trouble with CC crashing. Did you mean crashing to desktop, or just giving you a green screen within the map window? The green screen shows when CC uses all the available memory to calculate the new display, rather than trying to show you all the stages between then and now, and is quite normal on maps with this may entities.

Just in time then!

You're welcome :)

LOL! No, but I do like watching volcano live streams. Kilauea is erupting again right now.

I mean to have quite a bit of fun doing the Structures for Birdseye Regional.

The wetlands are already there. I've labelled the marsh, but not the swamp.

The swamp fill may need a bit more definition, across the inlet from Bantu

The forest fills are mere placeholders for now. All the same texture coloured differently by Colorize sheet effects. They will look a lot less like lumpy porridge by the time I'm done ;)

All the fills will be refined before publication.

I've got one river drawing tool. I think I will call it "River, default Amazonian", as it's 3 miles wide.

@Calibre We ninjad each other.

You could use just the hills as they are, or you can add the mountain tops I mean to create.