[Therion] changing wall line symbol

[Tarquin Wilton-Jones]

> Check line pit_AUT - it use two parallel lines, so there should by way
> to generate line as you want.


Note (to others who may be reading) that this relies on the passages not
crossing over each other. Once they cross over each other, you might
have hoped for the outer line to be clipped by the lower passage - it
won't be.

>> what I can do is generate a map for each level and then finish the
>> cartography in illustrator.


It may be possible to do this with CSS and SVG too. Export your cave
survey as SVG, and use CSS box-shadow to add an outline.

Or SVG's <feOffset> filter.
https://www.w3schools.com/graphics/svg_feoffset.asp


Tarquin