The feature I used is from Southern Cross tiles, unfortunately, only in black or a taupe kind of shade
http://www.southerncrossceramics.com/Folio_6.html
Patterned glass would be amazing, wouldn't it.... I am on the look-out. Checked out Southern Cross tiles... that grey looking one looked promising... Will be dreaming about it tonight... Patterned glass..... (actually, I am going to go check out your thread again RS and get some inspiration from your photos...)