This jacket and dress combo was made in Marvelous Designer, a 3D clothing modeling software. I have been researching various clothing modeling software, and so far MD has been the most intuitive to use.
If you have any questions, feel free to message me. I will also consider commissions.
I've been doing a lot of research work at my university into modeling software, with the goal of starting a small business based off of it. Be on the lookout for more pieces from me in the near future!