Re: No interior sunlight/sunrays graphics bug
@T-Bone_Bryant Have you confirmed that your in-game settings are on ultra? Does it make a difference whether the room has a roof and ceiling, or flooring or walls for that matter? Have you ever messed with graphicsrules.sgr inside the game's program files?
It would also be useful to test in a clean user folder, as in, move your entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, letting the game create a new one the next time it loaded.