[Therion] Best approach for colouring elevations

[Tarquin Wilton-Jones]

> lookup map -title "Map colour legend"
>   map1 at some_survey [colour] "passage in front"
>   map2 [colour]                             "passage in between"
>   map3 [colour]                             "passage behind"
> endlookup


This is pretty much exactly what I had in mind, and it works great :)
Sadly it is not documented anywhere (except the mail and wiki page you
already pointed to), so I can't see if it has any other useful features.
Just wondering; is there is any way to group them together, when you
have multiple maps sharing a value?

Eg.

lookup map:mainset
  segment1 at cave1 [100 40 40]
  segmenta at cave2 [100 40 40]
  segmenti at cave3 [100 40 40]

  segment2 at cave1 [100 70 0]
  segment4 at cave1 [100 70 0]
  segmentii at cave3 [100 70 0]

  segment3 at cave1 [100 100 0]
  segmentb at cave2 [100 100 0]
  segmentiii at cave3 [100 100 0]
endlookup

it would be nicer if these could be grouped so that you only need to
specify the colour just once per group (makes it easier to change them
if you reorder things, or a new segment gets added).

I can see ways to group dates or altitudes, but not scraps or maps.
Hoping I missed something.