Once I took out the hot springs bath, it has been working fine. Good question about trying it on a different save. I will check and see. Apparently no one else has had this problem, so that's good.
I don't know what the problem was before, but I cannot reproduce it with later saves. I can add the rejuvenating hotspring to the lot now, and it no longer causes a glitch in the floors of nearby buildings.
@afiery1 I experienced this on one lot with a wide covering plattform, that I then dragged down an area within. Did you have different heights, made by plattforms, foundations etc on the lots it happened on?
There is a bug report that seems similar; if you want to read for reference?
@DonroaAkashu That was an interesting thread. The glitch was only when looking at certain angles. 1st floors and walls would just disappear, but if I changed the camera angle, it looked fine. I wasn't using glass flooring. I did have one building with a glass roof, but not the building I had the glitch with. In fact, I changed the roof to regular roofing just to see if that made a difference at the time, but it did not. I didn't have different heights or use platforms. I am thinking it had something to do with a basement I'd taken out. I had put a new basement in, but didn't delete the old one. Just picked it up and removed it. When I realized later that you could delete a basement, I deleted the new basement and started over with the basement tool, hoping that would work. I don't know if that made a difference or not. I had assumed it was the hot spring bath because I didn't have a problem once I took it off of the lot. But looking back, I think I had deleted the basement and replaced it right before removing the hot spring, so perhaps I had to take the hot spring out in order for it to be completely fixed. But I'm just guessing here. I'm just glad that it's ok now. And hopefully, if anyone else has this problem, doing the things I did might help. Thanks.
@afiery1 Thank you. I would consider basements a height difference. I have also seen that on an old lot I made a long time ago, this kind of missing textures/blue void, on a wall of the basement, with an open room, without roof/floor on top, in front of it.
I have clicked Me Too on the bug report I linked, I hope you did too.
@afiery1 When I first read your post I went to reply then decided not to. But I think I will go ahead and add this thought to @DonroaAkashu's great information (that topic with the disappearing flooring was huge – and I was on more than one with my info since I had a lot with the issue for a while)...
What I was going to add as a thought was that perhaps when you did one of your fixes it addressed the issue, but the glitch was still showing for you for a bit due to it being snagged in your cache? That may explain why you couldn't tell at exactly which point it cleared out in the game, and why you cannot reproduce it (if the glitch eventually cleared from cache on its own). Of course, this may not be the case, but just in case I thought I'd mention this for others who may check this post in the future.
Occasionally a fix does not seem to entirely take initially for cache reasons, and to make sure that's not the the issue you can clear out your cache after the fix:
How to delete cache: • Exit your game and Origin • Go to Documents > Electronic Arts > The Sims 4 • Delete the localthumbcache.package file in your “The Sims 4” folder (your game will re-create this folder next time you open the game)