I agree with you. The material in the first picture is the most interesting.
I'm not satisfied with the color and I will try to find it in light shade. I suppose will possible to have it off-white or similar.
I have been using this fabric often in the garden but I don't know of what material is made. I suppose some synthetic composition, probably polypropylene.
I have very limited experience with models, I just started few months ago with my first card model, but I'm not against new materials.
I will made therefore some tests with glue and colors and try to find if it can be used for something.
Keep your good work.