Unfortunately, I've never used the Loom myself. I saw BB's posts about it back in the day, but was too busy with other things then, and then when I came back to Poser in 2021, I jumped straight to P12. A pity, I'm sure I would have learned a lot.

The weaver node does not produce any color output itself. One can plug anything into the diffuse color of the shader, be it a solid color, an image map or a procedural texture. I'd probably use a plain or satin weave in that case. Things get more complicated though when one wants to simulate a weaving where the color varies by thread, the simplest case being one color for the weft (horizontal threads) and a different color for the warp (vertical threads). The weaver node produces some output to help with that kind of thing, such as masks for the warp and weft, a thread number and thread-relative uv coordinates - some of these heavily inspired by a YouTube video I watched.

The houndstooth and checkered fabrics I showed are examples where both the warp and the weft use two different colors. I imagine in such cases I could hide away the logic for the color distribution into a compound node and give it two inputs for the colors to be used or something like that. It really depends on the specific material. I admit I haven't been very good at that kind of thing in the past, in part because I find organizing a shader into logical parts and laying it out on the screen in a readable fashion quite challenging.

-- I'm not mad at you, just Westphalian.