I came across one of the reasons Tarkin looked so bizarre in Rogue One. “…when the lighting on *Rogue One’s digital Tarkin was adjusted to match that of A New Hope, he apparently looked more like the original, but stood out as a digital recration because of different on-set lighting on Henry had been filmed with”

Found it in Dan Golding’s The memory of perfection: Digital faces and nostalgic franchise cinema

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