Is the material in transparent mode?
Nope. I checked it in Blender by turning on the Face Orientation option, and I found that some buildings have half of their mesh displayed in red, indicating that the normals are flipped. Those red parts are transparant awkwardly on UE5.
Wow! Okay, thanks for finding this bug. I'll fix it asap and update the package
It's fixed!
Thank you for your fix!!! I will make a nice game and announce you when its ready! Have a nice day and keep going on with your wonderful works!!