My house appears bright as if a wall is missing

@Lunatic_Talking  I would first like to check if there is compatibility issue with your Mods/CC. 

Please try the following:

• Exit your game then exit Origin. Please copy the Mods folder from your 'The Sims 4' folder onto your desktop (for future reference) then delete the mods folder and the localthumbnailcache.package file in your 'The Sims 4' folder and restart the game and so that the game will re-create the folder.
• Then run a game repair [ Open Origin, click 'Game Library' then right-click Sims 4 > Repair Game ]. Make sure to let it run until it has completed all repairs (it will do the base-game first, then run through each of your expansions/packs). After that, please see if the issue has stopped.
  (If It fixes the situation you can re-add your mods/cc one at a time to see if one was conflicting with the function/causing the glitch - but do not re-add the old config file from the old mods folder, as it is possible for it to have become corrupted also.)

Please let us know if this fixes the issue. If it turns out that you identify a Mod(s) or CC(s) that is causing a conflict would you mind letting us know by posting the name of the Mod here for others' reference? If the above does not fix the issue please let us know so we can look further into it. Thank you!