when the warp or warp thread/yarn is more visible in the weave/cloth/fabric, it should be discrete/distinct.

(or "the more visible the warp is, the clearer it should look", or whatever phrasing you choose)

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Giulia,

I found this website where they actually speak about making the sail of a boat, but the drawings make your sentence easy to understand.

http://www.maurofornasari.com/corso_2/pag2.htm


Hope it helps!

Warp
Pronunciation: 'worp
Function: noun
Etymology: Middle English, from Old English wearp; akin to Old High German warf warp, Old English weorpan to throw, Old Norse verpa
1 a : a series of yarns extended lengthwise in a loom and crossed by the weft b : FOUNDATION, BASE <the warp of the economic structure is agriculture -- American Guide Series: North Carolina>

Discrete
Etymology: Middle English, from Latin discretus
1 : constituting a separate entity : individually distinct <several discrete sections>
2 a : consisting of distinct or unconnected elements : NONCONTINUOUS b : taking on or having a finite or countably infinite number of values <discrete probabilities> <a discrete random variable>
synonym see DISTINCT

http://www.m-w.com/