Do you think it's possible to use the UV map of a cloth to define the exact size of cloth fabric ?
Actually I am unable to explain to the cloth simulator the edge spring that I would like to set to get the good edge length (to explain if the edge length should be pull or push.)
The problem is special true when a cloth mesh don't have the initial zero shape. When a cloth was morphed to a new shape, it's impossible to ask to the cloth simulator to return to the initial shape (since it doesn't know the initial shape)
By using the UV map, it will be possible to define the exact length of edges for each face, and so to provide the initial shape of a cloth to the cloth simulator. And then the cloth simulator will be able to know if the edge should be pull or push to get the correct length.
Also, by using this technic, it will be really easy to drap cloth on figure. For example we can oversize the cloth to avoid poke-trough. And during simulation the cloth will return to good size. We can also easily define elastic part in the cloth.