If you want to do weddings you better know how to take pictures of dresses.
This was a postcard I gave out at wedding shows back when I did photography.
I smudged out the phone # so I won’t get calls.

This was taken as the sun set and hit the mountains behind. I had 3 lights set on radio remotes, including one hidden by her dress on bottom right to light her face and cause a shadow line to define her sculpted arms.
You could get this image “accidently”, but I preferred to bring enough gear so that I could make the light I wanted if nature didn’t happen to cooperate.

BTW: The original picture, which I had to crop for the postcard, has the ENTIRE dress. Never. Never. Never cut a dress off in a formal picture.