[Therion] Sorting scraps/maps by height in default mode

[Benedikt Hallinger]

Hello there,
i have a very large dataset here. It is organised by regions like this 
(but much more leaf objects and regions):

=====snip=====
- survey TheCave
   - survey RegionWest
     - survey 1
     - survey 3
     - survey 5
   - survey RegionEast
     - survey 2
     - survey 4
     - survey 6
=====snap=====

I currently work from bottom to up, that is i draw the individual 
surveys as scraps, based on original material (sometimes they are really 
large and cosnsist of several many scraps).

In each of they leaf surveys (the numbered ones) i make by convention a 
map called "<n>-Hauptplan". The main idea is that every leaf survey can 
be treaten modular and that i can compile varoius maps at upper levels 
(i.e regions).

Currently, the regions have no "<region>-Hautplan". When i use "select 
RegionWest.TheCave", therion is instructed to select all scraps below 
it. For the most part, this works like intendet and the overlappings are 
calculated correctly. There are some places however, where the upper 
part of the passage is rendered below the lower part, which is wrong. 
This is with about 10-15% of the passages (so most is already ok).

I know from the manuals that therion does this "randomly" so there is no 
real way to adjust this from my perspective (placing the "input 2.th" 
command in the region.th file, wich then inputs the scraps etc, lower in 
the list does not help - it seems random where it is).
I think, however, that it would be a very great addition, if there would 
be some code in the renderer, that sorts the vertical presentation of 
the scraps/maps by average altitude of said scrap/map, and that this 
behavior is controllable by some configuration (cmdline option, or even 
better, thconfig parameter).
=> Is there maybe already something hidden like this i don't know so 
far?
That would be very great, because when i look at the dataset, i face 
about 30-50 hours producing correctly manually sorted handcrafted maps 
at the region level...


Sincerely, Beni