Ideas
emilyslowsimmer From your pics and what you've posted, I can't tell what is wrong that you are reporting. The only thing I see that looks a bit off is the back wall of the lower room. In one pic, it looks like there is no paint on part of the wall. Everything else I see appears to be caused by the walls being in drop down. So, if you can provide some more info specifically about what you see the problem as, it will help me help you a bit better.
If you would like me or another helper to take a look at the lot, one of us will take a look. All you need to do is upload the lot to the gallery and reply here with the lot name and your userid if different than the one you use here (emilyslowsimmer).
Hope this helps.
Hi! So to describe it more precisely:
I built a basement with 2 walls facing outdoor area that is also situated at a basement level. I made one of the outdoor-area-facing basement wall a glass wall. When I went back to the ground floor level to see how the whole build looks I noticed that when I look through this glass wall while being on ground level, the interior walls in the back of the basement room glitch out and instead of normal walls you can see a mixture of blue, green and black textures. You can see it on the screenshot 08-02-25_6-18-27.
On the screenshot 08-02-25_5-54-59 you can also see that looking at that basement room from the ground floor and from the left side of the build, it also makes the wall next to the stairs see-through, while I did not place a glass wall wallpaper on it.
I will try to record a video and also upload this build in its current state when I am on my PC.