Basements will not create irremovable flooring between levels.
Fixed in Patch 1.55.105
Product: The Sims 4
Platform:PC
Which language are you playing the game in? Polski
How often does the bug occur? Every time (100%)
What is your current game version number? 1.52.100.1020
What expansions, game packs, and stuff packs do you have installed? Cats & Dogs Get to Work Vampires Vintage Glamour Stuff
Steps: How can we find the bug ourselves? Build a basement room (on level -1), and then another one below it (on level -2). Remove ceiling from the room below (-2). Remove floor from the upper room (-1). (Or open an existing lot with basement rooms in this configuration.) If possible, ad stairs between those two levels and make sim use it.
What happens when the bug occurs? The part of floor/ceiling between rooms is still opaque, covered with the same earthy texture as if it was build above ground or not removed ceiling. https://ibb.co/xHfRqp7 https://ibb.co/Rv1vVc0 If there is a part of the room on -1 that's not build on -2, z fighting effect occurs on it. It's still possible to add stairs, but it doesn't affect the opaque floor, and sims seem to walk through it. https://ibb.co/zb7JggZ
What do you expect to see? If there is no floor on the upper room, and no ceiling on the room below, the room below should be visible form the upper level, just like it is if they were on -1 and 0 level, or 0 and 1 level. It was possible before. Removed ceiling and flooring should be invisible, there should be no visible barrier between those two rooms. https://i.ibb.co/qWwm02B
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure
I think the bug started occurring after last path or not long before it. Two level rooms below ground were displayed correctly on June 11.
It affected both already build houses with two level basement I had, in all the saves I had checked. It is visible all the times I try to build something with this room configuration.
