[jesperwe]

I wonder why when swipeing between the two sides of the disc it always appears convex from the currently viewed side, but flat when viewed edge on.

Anyone knows what could cause this?

[hashmal]

I think it's to avoid having two sets of data points. I think the "view angle" affects the "convex amount" so that edge-view = flat and all other viewing angles "bump" the data points a little bit to give the "convex" look.