Visibility

Here is an example of how [in]visible a change of twill direction is in the towels. From a distance:

and close:

For this towel, the weft is all 18/2 green Fox Fibre, which looks like a natural yarn until it gets an alkaline laundering. Here's the draft:

Ignore the blue warp threads in the draft; I used blue only to make areas where both warp and weft are natural, undyed yarn easier to distinguish on-screen. Also, I didn't bother to draft every repeat in the broad stripes; a shaft will lift whether it has 16 or 160 warp ends threaded on it.

I look forward to the wet-finishing, when all this faint detail will become more visible, as the colored cotton darkens.