Strapless panties? Yes! They are here!
A brand called Shibue Couture has Strapless G-strings, which seems interesting for models to consider for not just photo shoots but anytime! I think the best example was that you can limit the lines on the side of your panties, which would originally show through on a dress you wear. I am not 100 percent sure about it yet as a quality product-, but it does seem interesting and worth a try.