I've noticed that you can do some pretty neat stuff with the light source settings in MT (thumbs up for the devs!) and I was wondering whether anyone has (or knows of) creative settings who wants to share these...?
for example a yellow torch light has a conish long shape but in the vicinity you have a broader cone due to dispersion, which you can emulate by:
Torch light - 12 : cone arc=60 8#baa400 cone arc=120 3#615000 cone arc=60 12#615000
Or a yellow fading camplight:
campfire -20 : 1#ffc400 2#f2ba00 3#e4af00 4#d7a500 5#c99b00 6#bc9000 7#ae8600 8#a17c00 9#947100 10#866700 11#795d00 12#6b5300 13#5e4800 14#513e00 15#433400 16#362900 17#281f00 18#1b1500 19#0d0a00 20#000000
Or a really funky lamp with light that disperses in distance and in angle:
Lamp - 10 : cone arc=40 1#F2BA00 cone arc=40 2#D7A500 cone arc=40 3#BC9000 cone arc=40 4#A17C00 cone arc=40 5#866700 cone arc=40 6#6B5300 cone arc=40 7#513E00 cone arc=40 8#362900 cone arc=40 9#1B1500 cone arc=40 10#000000 cone arc=45 1#D7A500 cone arc=45 2#BC9000 cone arc=45 3#A17C00 cone arc=45 4#866700 cone arc=45 5#6B5300 cone arc=45 6#513E00 cone arc=45 7#362900 cone arc=45 8#1B1500 cone arc=45 9#000000 cone arc=50 1#BC9000 cone arc=50 2#A17C00 cone arc=50 3#866700 cone arc=50 4#6B5300 cone arc=50 5#513E00 cone arc=50 6#362900 cone arc=50 7#1B1500 cone arc=50 8#000000 cone arc=55 1#A17C00 cone arc=55 2#866700 cone arc=55 3#6B5300 cone arc=55 4#513E00 cone arc=55 5#362900 cone arc=55 6#1B1500 cone arc=55 7#000000 cone arc=60 1#866700 cone arc=60 2#6B5300 cone arc=60 3#513E00 cone arc=60 4#362900 cone arc=60 5#1B1500 cone arc=60 6#000000 cone arc=60 1#6B5300 cone arc=60 2#513E00 cone arc=60 3#362900 cone arc=60 4#1B1500 cone arc=60 5#000000 cone arc=65 1#513E00 cone arc=65 2#362900 cone arc=65 3#1B1500 cone arc=65 4#000000 cone arc=70 1#362900 cone arc=70 2#1B1500 cone arc=70 3#000000 cone arc=75 1#1B1500 cone arc=75 2#000000 cone arc=75 1#000000
Edit: screenshot of normal light with angle and the funky lamp:

screenshot of normal campfire and 'yellow fading campfire':

Edit:
Humbly submitting the Light Source Gradient calculator

http://spreadsheets.google.com/ccc?key= ... VeHc&hl=en
Attached is an excelsheet that should work with open office as well.