Looking good Matt. Glad to see you managed to get rid of the graininess. Btw, 200 shadow rays?? Isn't that a little too much? How long does it take to render?

Btw I thought that the number of shadow rays only affects softness. I could be wrong, but if you keep the radius to 0 does it truly help to have more than 1 shadow rays? However, in your scene the shadows seem smooth. I'm a bit confused. Can you make soft shadows with the radius set to 0?

Oh and Simon your scene looks really promising too. How come you haven't posted any more progress on it?