Oh I've been using it for YEARS, oh yesh!!
I take it that the latest version DOES contain it, then? PHEW what a relief, as I am using 7.0 - ANCIENT!
I believe it's the very version that Kat used for the Golden; she used "Pattern" for her backs, I can see. LOVE those "reflection" effects!!
Sure, ym, you can use it - just don't use it as a card-back, please, haha!
Oh - & I wanted to add, this puts me SO in mind of looking STRAIGHT up into a dome with a skylight in a Roman basilica - SO in keeping with my concept!