Allow us to place walls on half tiles
This one has been on my mind for quite a while, and I honestly cannot see a reason as to why it wouldn’t be possible on a technical standpoint. Sims can walk on half tiles; objects can be placed on half tiles and still be functional. You can place a double bed in a 3x3 room, and it will be fully functional.
The quick and gritty approach would be to simply make another wall tool, like half walls, that behaves like a wall. For convenience’s sake, disallow foundations to be half tiles… While I would love it, it may cause issues.
With that out of the way, this simple change would change the depth and detailing of buildings. You could finally have a medieval-ish overhang that doesn’t seem ‘too big’ because it’s one tile wide. You could make your own pillars/columns and allow them to be centred. You could have a 1 and a half tile wide hallway, which is needed in smaller homes as two is too big and 1 is too small.
Doors and windows may be an issue, but simply disallow them on a single half tile; instead, they must go on at least a 1x1 tile. It’d allow for nicer nooks but not need new windows and doors. Roofing is simple: add a half tile roof that is the same as others. There are no auto roofs, so it won’t cause issues.
https://i.vgy.me/N328eU.png
It's a picture of a floor plan with this in mind. Obviously, this was done in five minutes, but it highlights the potential for mostly exterior, but the interior has insane potential. Even the purpose for furniture, such as half tile wide cabinets and counters. It would be massive for Tiny Living (which also needs a complete revamp).
That’s about it, thanks.