What is this?

[beauregaardhooligan]

Originally Posted by glatt

I think there have to be two seams, otherwise one of the 3 colors won't make it onto the screen. One is very clear in the nekkid cube pictures, but there is a faint hint of another. Maybe I'm just imagining that I see it, but I'm 99% certain it has to be there, so I think it is.

I'm guessing that is an internal reflection of the seam within the prism?
I'll look more closely when I get home.