Looking good :)

You still have a lot of nodes in that coastline and land shape. If the map starts to get a bit slow as you continue to add more stuff, you might find it easier to run SIMPLIFY again on both those things with a slightly larger value than before. You would be surprised just how much of that frilly detail isn't really necessary at continental scale.

I was just writing the same thing...

Anyway - I'm glad you have it all sorted out now :)

This happens sometimes when the nodes are too close together. You will need to explode the landmass just once, and then type the command SIMPLIFY on your keyboard and hit enter. If you leave the value at zero it will remove any node that is right on top of another node. If you give it a small value it will remove nodes that are closer together than that value.

Do this to all the little lakes as well.

Now you can either use the multipoly tool to remake the single mass with holes in it for lakes, or you can add a Color Key sheet effect to the LAND sheet and then change the colour of all the lakes to match the Color Key (usually magenta, or colour number 6). This will cause the lakes to cut virtual holes in the land polygon (providing they are in front of it).

The advantage of keeping the lakes separate and having just an ordinary polygon as the main land mass is that you can trace the coastline with any fills you want to take to the edge of it. A multipoly can't be edited or traced.

It's a little small for me to see all the details, but it looks like a lovely map :)

The level of detail you can have on a map is always dictated by its finished size, and for the same piece of land it varies depending on how large you export it or how closely you zoom into it when you are using it. If the size of the map you use is limited by the VTT in a way that means the map looks too crowded even at maximum zoom, I recommend splitting the detailed map into a series of regional maps in a two-tiered system and drawing a more simplified version to show the full continent with the country names and so on. Think of how little detail a map of the world really contains compared to a map of the county, state or region where you live.

Nice map :)

I'm not familiar with either Cosmographer or with using SS3, but if you can switch the lighter grey floor for the darker grey floor that will make the club look darker than outside for a start. Then if you want to go even darker use a Hue/Saturation Lightness sheet effect on the floor.