I have added some highlights and low lights to the rock. Below is the photo.
Ok side by side.
The fabric resembles the photo but a bit darker. I think it a reasonable facsimile. Maybe with a blue background and grey or blue tulle over the portrait work. I hope Mike and his family like the stylized result. I need to make the birds yet. I am thinking I will use black batik for the cormorants. The tight weave frays less. I could actually sew in the tulle from left to right completely. Another thought.