[Therion] bad scrap overlay

[Martin Sluka]

Imagine two sloppy passages like faults side by side. On map, one of them should be drawn „above“ another one „bellow“. But there could be a problem for Therion - centerline in passage „above“ is on floor of it and centerline in passage „bellow“ is near ceiling. It means centerline of „bellow“ passage is higher than centerline of „above“ passage. So only human may decide what is „above“ and what is „bellow“.

m.s.