Try a fill with a more visible texture. It gets a bit harder to find something nice due to the perspective nature of the map, but you could try with something like the Stone Lava Cooled bitmap from DD3.

Additionally, the pixelation of your current fill is really bad, causing it to appear more like a uniform mess. Try decreasing the scaling of the fill as well. That leads to more repetition when zoomed out of course, so you may need to consider working a bit with the surface, applying layers of different fills and blending them using effects to avoid the repetition.

The symbol behavior is down to you having lots of unrelated stuff on the HEX/SQUARE grid layer. Hex symbols are special symbols that automatically align with the hex grid, but all that other stuff is basically just confusing them.

As for the export, it looks for the lines on the MAP BORDER layer to see what area to export (If you have the restrict to map border option on), and if you check that layer, you'll see that the defining lines (green in your map) just covers the map area, and do not extend to include those informational areas.

Hatch styles are just CC3+ drawings. Very similar to symbol fill, but it uses an .fcw file instead of a symbol. You'll find all the existing ones in @Hatch Styles.

Hatch styles are not normal fills however, and only work with drawing tools. If you make a custom drawing tool, and set the outline to be an extra entity, you can pick the desired hatch style in the properties for it in the tool. The list here is just all the files in @Hatch Styles.

These hatch styles should be basic, simple drawings.

I know Ralf have done some work on hatch styles in some of the live videos. I'll update this post with links if I can identify them.

Here's one explanation:

The issue here is with the wide lines. Unfortunately, symbol fills cannot have lines with a width other than 0, nor can they have solid filled polygons.

If you change the line width to 0, it should work, but that probably won't be the look you are after then.

You're probably better off making that as a png image instead and using it as a regular bitmap fill instead.

I am not familiar with that tool, but looking at it, it doesn't seem to be able to export maps in a format CC3+ can use. Which gives you two options:

• Use their svg export, find an online svg to dwg/dxf converter online, and then import the result from that into CC3+. That preserves the vector maps, but you're probably going to end up with a pretty bare version that needs lots of work before it is back in a state similar to what you have online.
• Use their image export, import the image into CC3+ and trace it. This has two downsides. First of all, tracing is quite a bit of work for a large map like the one created there, and secondly, their image export is a bit limited. If you export it as a single image you're not really get much detail, while the highest scale export is a nice high quality, it still isn't close to getting all the detail you can get by zooming in, and while their tiling function can be used to get a much higher detailed result, dealing with a huge number of tiles that needs to be assembled has it's own challenges.