I want to build this tiny home that I found on YT. It has some outside stairs leading to both the 1st floor entry and a balcony. [ Spoiler ] But regardless how I try, I end up with this ugly us...
Another option, I did this in Sims 3 a lot: if you use mods look up 'Various transparent floor pieces.' on Mod The Sims. it works like applying a floor texture but its see-through. I believe that Sims functionally 'needs' a floor beneath the stairs in Sims 4 often.