funny sidenote on the " two towers" (pun intended!):
the SSD(Vader's Star Destroyer) Executer, had not always that misleading tower:
http://images2.wikia.nocookie.net/__cb20090525025413/starwars/images/9/93/Executorart.jpg
http://imageshack.us/a/img407/7716/conceptarts.png
another point of interest is, that there was a lightsource to be seen onscreen:
http://starwars.rossiters.com/images/esb-054-01_640.jpg
wish I had the complete storyboards, there are some really nice shots:
http://theswca.com/index.php?action=disp_item&item_id=47594
ok, so we agree that it's a "point of view" - new question, because I stumbled upon it while I searched for pics of SD, bridges and towers ;-)
Ady, you corrected all SD engines in ANH, so that while in real/subspace there are only those big 3 are burning (the 4 little are for Hyperdrive), will all SD engines be correct in ESB too - and more important, while this is incorrect in the original: are you repairing the "all-on lights" in ROTJ ?
http://images2.wikia.nocookie.net/__cb20081003185538/starwars/images/0/04/ISD_egvv.jpg