Cheers and Yes Dune. That's why I asked about adding SSS used as masks. In fact I used a translate shader to double up the mask for ruts and a separate wider one for the veg mask. I'm getting used to the SSS now it's a simple but potentially powerful tool. My biggest problem was from fake stones, we need some sort of rock generator rather than fake stones. I had so many issues in this complex scene with FS picking up strange colours and displacements - never did quite sort them all out. Mick
