[Therion] Wall visibility affecting lox model

[Bruce]

>I've also removed all my duplicated invisible
>wall lines and just set the option '-outline out' for the chimney
>lines which are also walls in my sketch. This works great and both my
>PDF and lox model look like I wanted them to.

How do the kml map outputs look Footleg?  Are they rendered properly?

> But I always thought
>it made it clearer that there was an aven above the general passage
>roof at these places if I encircle the entire aven with ceil step
>lines. In effect I am using the ceiling step line to indicate that the
>ceiling inside that line is higher than the general ceiling height of
>the passage. What do other people do? 

I usually would draw it as Footleg has, but using and aven or chimney
linetype as is usually done on NZ maps.  I don't think it really matters -
just a style preference.

>I've attached another screen
>grab from my PDF. This also shows the pit as it is intended with the
>scrap included which covered the floor of the pit. Then you can see
>that the pit is no longer transparent on the PDF.

This is looking good now, (but at the risk of being picky) if the blue
passage were to be offset 50m to the right (or not appear at all in THIS
output map) then the pit would be 'white' and apparently not inside the cave
(a pillar).  And what of the green pit?  I guess if it were as deep as the
blue pit, then if the draughtsperson were fussy it's bottom could be yet
another scrap, but I admit I would not bother.  Anyway, with the blue
passage offset, the two pits look fundamentally different when the passage
below is offset as Martin pointed out.

If the pit line in the scrap above the blue passage has either outline in or
out set, then I am surprised that the loch model does not have a recess or
some odd looking characteristics here.

Anyway, if using outline options alone can produce near ideal pdf, kml map
and loch model outputs in one go, then I guess its near enough to problem
solved (just the 'pit-bottoms-blank-when-sometimes-offset' problem remains).

Bruce
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