Originally Posted by Tommy Burns

A couple of things I've noticed have only done a few int renderings with mr but I always got good lighting. First I would say is I always use FG at Draft standard setting maybe Low but never medium must take ages to render.
Not to sure on this but you have Read/Write and Read only ticked. I would usually do a test render with none of these ticked so I am getting no saved settings in FG.(I think this is your main problem) Then if it's right I would use the read write option to speed up the main render.