Thanks to Zanthia2, we now have an image of the Castle Black film set at Magheramorne Quarry after filming has commenced there. As you can see, part of the quarry wall has been painted white, which fits reports we’ve had from extras. The picture was taken from a nearby island:
One detail that leaps to mind is the structure on the quarry tier immediately above the white-washed section of wall. It looks like an arch and a low wall around it. We’re not 100% sure, but we think this could explain word that actor Brendan McCormack was starting filming in the middle of this month. Could it be that McCormack, in the role of Ser Vardis Egan, will be shooting scenes set of the climb up to the Eyrie at the quarry? If so, that structure we see there could very well be one of the way castles, perhaps Snow or Sky.
Alternatively, the structure—if it does have anything at all to do with the production—might be used to show one of the gates and tunnels that lead through the Wall.
Thanks to Zanthia2for the photo, and Winter is Coming for the retweet.