Hey Claeric,
What you are seeing is a normal compression artifact that happens when a texture/skin is converted to the .DDS format that is used in Sims 3. It can
be lessened by using the DXT5 .dds format, making the texture higher in quality, but in the Sims 3 it really will not make a big difference.
You could have a very clean and blemish free skin texture, but once it get converted to .dds you are going to see things like this. The best way to
get around it is to add some variance to the skin. I tried making skins of higher resolution and quality, they looked great outside Sims 3, but once inside
the game engine just used the default 1024x1024 skin and all the added detail was lost. So when we can figure how to tell the game to use higher
resolution textures, say a 2048x2048 or even a 4096x4096 allot of this graphic garbage could go away. Blame the game coders. of course higher quality
will mean a more demanding graphics chip.
Imp