Not sure if this was a mod or not, one time on Instagram I saw that someone had a sim painting a picture of another sim, and then they hung it on the wall. Is this possible? Or is there any way to choose what our sims paint?
I am not sure if this is what you are looking for but you can turn off free will in Game Options> Gameplay (I think, it might be under "Other")> Autonomy> Off Your sims will literally do nothing unless you tell them to. You can also turn it back on if you need.