I've been experimenting to try to draw some more complex features in Therion. One of these is where a passage contains a pit with a second scrap going off at the bottom of the pit. There is an example of this in the Therion By Examples pages on the wiki. http://therion.speleo.sk/wiki/doku.php?id=tbe:wiki3 In that example the lower scrap in included in a separate map, and that map is then included in the upper map using the preview command: map map5 -proj plan scrap1@s1 break scrap2@s2 preview above map22 endmap What is the purpose of using two maps here? I appear to be able to do this with a single map containing the two scraps. My second question is whether it is possible to show the pit as a hole so that the colour of the lower scrap shows in the bottom of the pit when I colour by altitude. Currently my pit is coloured the colour of the upper scrap and the colour at the bottom of the pit shows through the transparent upper scrap. But as there is no floor in the upper scrap at this point, I want to have no colour shading in the upper scrap so it is clear that the bottom of the pit is at the level of the lower passage. See the attached bitmap showing an example of what I mean (not drawn with Therion). The green lower passage is clearly shown at the bottom of the pit where the pit floor is coloured green. Can I do this in Therion? Footleg
