Attached Link: Butterfly Dresses - dynamic & conforming versions

It's easiest to create a dynamic dress first and then make it conforming, I think. But to really do things properly, there could be quite a lot of differences between a mesh intended to conform as opposed to one intended to be dynamic. Dynamic clothing would ideally have polygons of uniform size, and probably more of them than are needed for conforming cloth. There's also a suggestion that Delaunay triangulation is best for cloth simulation, whereas it wouldn't be optimum for grouping a conforming item (though I know Steve has done it that way in the past).

Note that I haven't followed any of those suggestions in the linked item, other than the one about making the dynamic version first. Do as I say, not as I do. :)