I want to say it is a swatch from the SS texture tools set by Silverleif Studios over at Daz,they had a second set here once but I can no longer find it.
I know I have the swatch it's a white backgrounded fabric called celestial I think comes with a matching border too.

http://www.daz3d.com/i/3d-models/-/texture-tools?item=176&_m=d

3DZ

Funny YouTube video of the week - Bu De Bu Ai