Casual wedding dresses may come in a wide variety of styles such as classic style wedding dresses, sundresses type of wedding dress and simple traditional wedding gowns. Here some features on how you can distinguish a casual dress from a formal wedding dress: 1. Ornamentation: Casual wedding dresses have usually lesser decorations such as sequins, lace, pearls and the like. The minor accents can be only fouprom dresses evening dresses homecoming dresses nd around the neckline, bust, or waist. Casual wedding dresses are known for its simplicity.