This article reinforces how much there is to know/learn about weaving. How utterly complex it can be and how endless the possibilities are.
“Probably the most common yarns/setts for contemporary overshot fabrics are 10/2 cotton for warp and tabby weft at 24 epi and either 5/2 pearl cotton or 3/2 pearl cotton for the pattern weft. The fabrics woven with these yarns/setts are usually sturdy fabrics in a weight suitable for placemats and towels. 3/2 pearl cotton would also work (and not be too heavy) for the draft you’re using with 5/2 cotton, unless the pattern-weft floats are very short (this would be for a delicate design, usually looking very twill-like). In that case, the 3/2 pearl cotton weft would not pack in well enough and you’d see streaks of the tabby weft between pattern picks. By the same token, if your overshot design has long pattern-weft floats with large blocks of pattern, a 5/2 pearl cotton pattern weft is likely to be too thin to cover the blocks; in that case, you’d also see streaks of the tabby weft between pattern picks.”
Wool has the ability to swell, or full, to fill in some problem spaces whereas cotton does not have such flexibility. I look forward to experimenting with some of these function in the future!