Not really a photoshopped piece of work, but something I came across while playing just then.
I noticed a bath from one of Simtomatic's sets had writing in it.
I looked around the room but none of my wealls had writing on them, and I moved the camera angle in a way so I could see what it said.
It said something along the lines of "+x" on one line and on the next line it said "RIGHT".
Here's a screenie I took, it's weird.
Edit : After looking around the bath more, turns out it's just telling people who recolour the bath what sides are what, as there's a left, right, top and bottom written on diff sides of the bath.
*facepalm*