The Sims 3 Textures
From TS3wiki
For Sims 3, textures usually comprise of shading, highlights - and a map to tell the game which patterns to apply where on the mesh. Not using the textures correctly can, at best, leave your object looking dull and out of place, and at worst can badly affect how well your mesh recolours in the game. However, these textures are really very easy to make.
Learn everything about textures!
Textures
Additional Info
Here comes texture size, baking, UV mapping, texture formats etc.

