Generate a fashion lookbook based on the concept 'Drop'. This may include an assortment of outfits inspired by elements such as rain drop pattern, droplet-shaped accessories, and tear-drop designs in earrings or other jewelry. The collections could vary from elegant gowns to casual streetwear, blending in the concept of 'Drop' in an innovative way. Consider different fabrics and materials, some of which could have a reflective or glassy finish to mimic the properties of water. Ideally, the lookbook would contain various outfits for both men and women of different descents - African, Asian, Hispanic, Middle-Eastern, and Caucasian, each tailored to their unique style and preferences.