What I do is:-

Load the dress.
Use the Poser morph tool set to smooth and smooth the bejebers out of the dress removing every crease and fold.
Export the dress OBJ.

Load the figure and original dress.
Do your Cloth Room Stuff.

Load the saved smoothed dress as a morph target.

............... and set the dial to minus one.

ta-dah! welcome back folds and creases.