I suspect talking reflections to photographers was my bad. Suppose what I was trying to get at was the way something is embossed and it's invisible at a certain angle. Just wondered whether the ink was slightly thicker or even it's reflective qualities. Then with the slight adjustment made it flatter. Think I better step out now this is way above my pay grade and knowledge(suspect light physics) more thinking aloud.
As for the Rorschach test of to Google, interesting though I see your way in the photo.
I'll sneak back to the sidelines now. I've still got plenty to learn be fascinated if the answer is found.