[Therion] color preview-below

with layout color preview-below i can set the color of the maps that are "below" in the selected map, eg.,    map ...       ...       map1 [10 10 m] below   endmap maybe it would be useful to be able to shade the maps below by the map or by the altitude as for the other maps. it would make plan map of vertical caves more legible. i could not change the color of the (outline of the) maps above. for these too it would be nice to set the color by the map or altitude. by the way what about a color option for the "below" and "above" maps ? eg.    map1 [10 10 m] below color [80 60 40] thanks, marco