Hi, me again...  :-(

I did a render with 3 Lights.
The Main-Light has Shadows enabled and its an Infinite-Light.
The 2 others are Spots and the shadows are disabled.

After rendering with Firefly i`ve got THIS Result:

Why are there such "lines" or "Distortions" on the skin?
Did anybody ever had such similar error?

Thanks to ya all!
Factor