Thanks Ayako!
Luca Gabriele Rossetti is a digital artist working in feature films. He’s a concept artist and a matte painter. He talks about his work in these two interviews found here and here. We learn from the first interview that he worked on 47 Ronin.
Each interview has photos from his gallery, however, none of them are clearly marked. Based on photos from the Shepperton lot that have leaked out, a photo in each of the interviews may be for Ronin. The interviews were interesting to read, especially if you are interested in industry workings.
Set photos during various phases of construction:
From the interview, these MAY be for Ronin:
