I think I like them better as well, though I want to add a few more details, either to the image or the map file.

While I'm developing my own kind of mapped mountain technique, I should make it known that I will do mirror versions of each symbol, since reflecting just the one original doesn't work well. Map files don't like being reflected. The whole style will look better if you don't mirror any of the symbols, but stay with everything the right way around.

Rotating and scaling is fine. Just resist the idea of mirroring things.

Remy taught me how to do it. Press SHIFT+the windows key+S, and then pick your spot with the mouse.

(This is Win 11. Don't know if it works in Win 10)

I got it to export with everything visible after I used SIMPLIFY on the land, set to zero. That removes any duplicated nodes right on top of one another and neatly trims all those hundreds of nodes you don't need outside the map all in one go.

It's still very slow to pan and zoom, though not quite as bad as before using SIMPLIFY on the land.

Try using it on the forests, and anything else you have in the map that isn't a smooth poly.

Incidentally, you don't need to go through all the rigmarole of doing a rectangular section if you are exporting the whole map. Use Restrict to map border and export an ordinarly JPEG bitmap. The frame is on the MAP BORDER layer and works just fine.

Another alternative I've used in the past is to have the land as the background with all the terrain on top of that, and then add the water - a bit like a city map, but overland. I call it "sea over land". I think Darklands Overland is done that way. Birdseye Continental is definitely done that way. Oceans and rivers are drawn on the same sheet. A Color Key is used to cut island continents out of a rectangular map-covering ocean, and regular non-Color Key rivers drawn on top of the land and terrain on the same sheet.

However, when you are revisiting an oder style it's best not to make major changes when the older style was originally what I call "land over sea". It's too confusing for new mappers.

If you check the list of files you can import using Insert File in the Draw menu, it shows some types of CAD file, but I'm not sure how current those file types are. I'm assuming that this list is a list that has existed since the dawn of CC, so file types may have changed since then.