I'm in the cutting stage for a very scrappy flying geese (columns with sashing between) and can't decide on the "sky" fabric (all the same, and maybe the sashing will be the same too.) I'm thinking of the undyed muslin but wonder if the quality is good enough. And will it be too plain? Is there a difference in muslin quality from Joann's vs. an online store? Beige tone on tones are hard to find, especially online where you can't really tell. Please advise.