At last , I succeeded to make a dress that worked in the clothroom. I think that the straps on my first attempts were too small. This is a simple dress with a turtleneck and took only three minutes to calculate. I didn't use constraints, only dynamic groups.

I suppose that it is possible to add some extra ornaments like buttons and belts in other programs, like hexagon, carrara or Rhino3D or whatever one has...

-How can you improve things when you don't make mistakes?