That is just a default texture for when the game can't
A. Load the texture
B. Find the texture
Made a purposefully borked recolor and it shows this texture in my game.
Some reasons it can't load the texture in another case:
Memory leaks- this game has a lot. It depends on your system's spec and how long you keep the client open for. A restart may not always fix it because everyone's system uses different type of memory resources, but it could help.
Using EAxis' "voodoo"' recolors- This is a fault of maxis as already stated in this thread but to recap, I think it shows more incompetence of the creators. Instead of applying the new repository system Create a style thoroughly for all objects they used the method of the Sims 2 as well. I deleted all the objects/bulldoze lots of this nature and they do not appear with ? mark texture any longer.
Missing pattern- you did not install a pattern that came with a custom house. I can only imagine the nightmare people download from crappy T$R. If you want to avoid this mostly completely, do not use any installers! Install everything manually! Learn to use your computer to save your life one day.
The very first time I got the riddler wall paper was after the first patch 1.27 that I noticed it.Couple of nights ago I noticed the riddler struck again at my Goth house.I have since bought a new computer and this is a whole new game.I say there is a problem with the game it self or the very first patch.
With the latest patch this does not appear to be a problem on my system, I do think they realize the memory problems and tried to fix it but not well enough. There is 2gb ram, and ATI card the game runs fast until the create a style is utilized. Then it became a constant crawl with the flashing ? texture appearing if I am in the middle of my town. This disappears on restart.