And here's the soft rayon with an identical print (which I didn't actually realize was exactly the same - also, I thought it was paler) that was intended for an envelope chemise:
The problem: I like them both for dress fabric. Obviously I'd have to check to make sure there's enough fabric in the rayon, but with the heat right now I'm leaning toward lightness. At the same time, the weight of the twill means it will work better without a lining and, perhaps, hang better on my body.
Or. If you remember my previous post on the subject - what if I were to use the twill for most of the dress, with the rayon (lined or backed, maybe just doubled) as the center front panel, the sash, sleeve borders, and perhaps as overlays to the gathered side gores, making it a bit reminiscent of this 1921 lovely:
|NYPL 817486; search "women 1921" and you'll find a series of these|