I'm on a roll here. XD
Well, after fighting the game because it did not want to display my shiny new wall that I had created, I noticed that Create a Pattern automatically tiles whatver pattern you upload into it so it's about the third of a wall. So I got to thinking - since the game seems to ignore bump maps, why go through the trouble of cloning and redoing a wall? Why not just make a single flat wall, with three recolorable channels, and split the wall patterns into thirds and import them via Create a Pattern? So that's what I did; I forsee that making walls will be much easier now. XD
The library is done now. I redid its walls using the method I mentioned above, and while there are three thin lines where the three sections of the pattern meet, I still think it looks loads better than what I had before. For some reason, half of the floor is much darker than the other half. Don't ask me why; it's likely Sims 3's doing. The lighter area on the wall behind the pushable bookshelves is a hidden door that will blend in with the wall in live mode, only becoming visible once a sim investigates it.
Close up of the wall. The wall is darker than it is in Penumbra. That's Sims' doing; it for some reason darkens every pattern you put in. I normally lighten them up in Paint.NET before importing, but I was in a hurry and forgot this time. Still looks nice though, lines and all.
I got Storage done too. That green thing in the middle of the floor is a switch that will activate the steam trap (those holes in the floor beside it) when a sim steps on it. I figured since i couldn't drop a weight of their heads that a steam trap would work just as well. Once in live mode, the trap and its switch will become invisible. The trap will be visible once it's activated, but the switch will remain unseen.
Oh by the way.. I found a saw. XDDDD
What has been seen, cannot be unseen.