http://www.google.com/imgres?q=curtain&um=1&hl=en&client=firefox-a&sa=N&rls=org.mozilla:en-US:official&biw=1288&bih=659&tbm=isch&tbnid=AZeapDx2q2ENJM:&imgrefurl=http://www.vectordiary.com/illustrator/illustrator-tutorial-realistic-curtain/&docid=AZJ85-ufZw7w5M&w=400&h=299&ei=MP-AToiHIsXnsQLHurTqDg&zoom=1&iact=hc&vpx=599&vpy=292&dur=843&hovh=194&hovw=260&tx=187&ty=116&page=1&tbnh=140&tbnw=194&start=0&ndsp=11&ved=1t:429,r:2,s:0

Curtain picture