I've tried searching for fixes for this and the only ones I found were many years old so hopefully there's an easier fix? Anyway, some of my worlds in the Sims 3 are completely red, but operable. Suns...
Before reinstalling your games, try moving the Sims 3 folder from My Documents\Electronic Arts folder. Don't delete or misplace it as you will need to get it back.
Then open a fresh game in each of the problem worlds and see if you still have the problem.