It also seems to me that the dress is a custom creation, with elements of some products you have pointed out, with custom shaders, and so on. I can start working on it now. Thanks!
Thank you all for all your great recommendations. It is not sure I will have the time to do everything in the very near future, but I take note of all the tips and tricks here, when I can do this.
Hello LivinPixels and Checkit1414,
Thanks for your ideas and comments - I share your pain as well, Checkit1414!
I will try to be creative, then!
Take care,
Charlie