[Therion] Surface profile in elevation maps

[Bruce]

> From a cave diving perspective, it would be useful to add local zero 

depth lines using a similar process. Is there an appropriate line type 

to use for this?

 

 

I have not yet drawn a wet cave, but I've been experimenting with 

 

line border:presumed -clip off

 

for flood levels.  You need to use 'adjust horizontal' for the second line
point to make sure the line stays horizontal after morphing.

 

The adding a bit of an area water inside a border:invisible line.

For a wet cave you might use area sump.

 

An example here



I have the flood levels in a separate map so I can easily toggle them on or
off.

 

Bruce

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