/cgl/ - Cosplay & EGL

Any reccomendations for this robe material? I'm not sure what would give it that smooth look. I'm also thinking about using essentially a giant 1/2 circle skirt pattern modified with sleeves for the robe, is that too far fetched? I'm probably going to wear a ballgown petticoat underneath the robe for the poof. Basically this robe puts me way out of my element. I'm used to casual clothes. Any advice would be great.