It's entirely possible. Especially because Obsidian already made provision for it. There's an animation to hide the roof tile and there's a fake sky behind it:
It just needs to be triggered via a script. I'm surprised TSLRCM doesn't already do it.
Edit: Ah, I see what it is. The roof tile mesh isn't under the A node in the room model, so the animation doesn't apply. It's actually already scripted and seemingly unchanged in TSLRCM:
https://github.com/KOTORCommunityPatches/Vanilla_KOTOR_Script_Source/blob/master/TSL/Vanilla/Modules/232TEL_Telos_Underground_Base/a_shuttle.nss
Extract this into your Override folder. Should fix the issue, although note you'll have to load a save before the above script fires.
232tel14.zip