Originally Posted by MissieYohko
I'd recommend you avoid heavy silks or satins, they don't usually look too good in convention photos unless you have a knowledgeable photographer/good lighting.
*cheap* silks and satins look bad. Decent quality (prom) or high quality (bridal) silks and satins look fabulous, even in point-and-shoot photos. Flaws in sewing do show more in satin than cotton, but if it's well made and ironed either one of those fabrics would work fine. I wouldn't use silk for this unless you can get a medium or heavy-weight silk, which is pricey. A matte satin could work, as could sateen.