Hi all,
thank you for the comments and feedback. I used pre-made Carpet Low Beige material from Corona Material Library. Just replaced displacement map with custom one - see attachment. It's rough and not seamless (but you get the idea), I will post final version asap. If you zoom in, you'll notice soft noise on light parts of the texture - this is to give soft fuzziness. I also altered displacement and SSS values to gain required look. Displacement Screen Size is 0,6 px.