miscs0ul I haven't had any problems that I've noticed with zooming in, in my basements or elsewhere. I can get as close as I want from most angles but that is on me and how I built out the basement. The only camera issues in basements are with taller objects that don't fade out as the camera gets close and wall hung things like mirrors and one or two other objects that have options on them. It's always been that way for me so nothing new.
However, since you've said you have "fixed" the camera.ini file, that might be your issue. Change a setting for one thing and then you get surprised when other things get changed that you didn't anticipate. Easy to do and I've been there, done that. So, my first suggestion is to move the file and run a repair, so a new one gets generated. Just use the one that the game generates without changing anything. If you are able to zoom in, in your basements, then you'll know if that is the cause of your issue. If it is, then you'll have to make a choice of whether to continue to use the modified settings file or the default one or if you just swap them in and out when you want to make certain screenshots.
Hope this helps.