I am already doing almost exactly what Martin suggested. Duplicating the line in a text editor and turning the copy of it into an invisible wall line. I am doing this in the scrap I gave in my example being the bottom of the pitch, so the pit edge line is not in that scrap. The passage continues in another scrap at the higher level. So I am using the same trick there to draw the floor step line along the exact path of an invisible wall line. I make sure the floor step line ticks appear by adding the flag -clip off to that line. You might wonder why I do not just join the scraps and not bother with the invisible wall lines in both scraps? Well if I do that then the colour fill by altitude does not follow the line of the pit edge. Instead it is drawn as a straight line between the wall ends. See the attached bitmap for how it renders using the invisible walls with colour by altitude. Footleg On 12 May 2012 06:56, Martin Sluka <martinsluka@mac.com> wrote:
On 12.5.2012, at 0:59, Bruce wrote:
line wall subtype context-<otherline>
where <otherline> is any other currently defined line type?
As I wrote, wall has it own very important role. If you need line as wall but with ticks as pit you may use the trick I wrote before.
The problem with pit and wall could just the problem of mathematical topology. Because pit in 3D is pit, not only line. So therion must correctly add there something as virtual vertical passage.
m.
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