I figured out what happened and have been able to fix the issue. The shader I use was not working and the map just had to be re-compiled with the corrected shader. Now the mothership interior (while still fairly dark) will look much lighter and have the lighting effects it always should have (and indeed thought it did until very recently).
Check out the dimly lit corridors leading to your landing dock...
Grab a cup of coffee at the Starbux...
Go to the lower level and stop in at the Starbux ... or visit the Cygnus Lounge (now serving Starbux Coffee)
Changed files in this update