If you don't mind departing just a little from the Tome to get this one thing the way you want it to be, you can add a Color Key sheet effect to the CONTOURS (SEA) sheet, move it above the Edge Fade Inner sheet effect, and then draw a solid polygon of magenta where you want the hole in the contour to be.

Make sure the Activate Sheet Effects box is checked and ok.

Pure gradients (setting up a fill in a polygon that shades from one colour to another straight across, radially, conically, etc) aren't currently possible in CC3, but you can use a large Bevel, Lighted effect on the crater sheet in combination with a crater shaped polygon of a solid colour, followed by a Blend Mode sheet effect set to overlay.

You will need to edit the effects and play with all the settings to get it just right for your particular map. These are the ones I used on a plain white circle of about 12 feet in diameter, though you can use any shape or size you like.

That is most usually caused by the lights not being present in the current render pass, and not accounted for in the total light falling in the current render pass. At a guess that image took 2 passes to render.

Type EXPORTSETMPPP and hit enter.

The number showing in your command line will most likely be 4000000 (4 million)

Type 40000000 (40 million) and hit enter.

That will expand the size of each pass over the map as it is rendered, and hopefully prevent the artefact by completing the whole map in a single pass.

From Google:

In south and western England, a hundred was the division of a shire for military and judicial purposes under the common law, which could have varying extent of common feudal ownership, from complete suzerainty to minor royal or ecclesiastical prerogatives and rights of ownership.

From me:

I live in Uggscombe Hundred, though I'm more likely to call it the Parish of Chickerell and Chesil, which is the modern unitary authority (similar, but not identical in shape and extent). As I understand it the ancient hundreds were presumably resposible for providing at least a hundred men at arms in response to the local lord's call for arms.

https://en.wikipedia.org/wiki/List_of_hundreds_in_Dorset

Hi :)

If you open the catalogue file (that's the [Foldername].FSC file usually visible in the parent folder of the [Foldername] containing the symbols), you can export an FCW file with all the symbols arranged neatly and ready for printing using the "Create catalog thumbnail file..." option.

In this example I created a Test.FCW file on my desktop which looked like this when opened.

The blank space at the top left is a drawtool and not a symbol, so it's name is there but the sample line is not.

I then exported a jpg bitmap from this and got this result (this is only a 500 px export to preserve the copyright on these symbols on the forum, but you can set it any size you prefer using the Options button in the Save as dialog.

This works for each catalogue at a time, but it doesn't take too long to do, and if you print each one you can make a reference book of them for yourself.