The shader is quite simple: it´s a standard max material with an oren-nayar-blinn shader and a checker map with a very high tiling. I started creating a custom cloth pattern for the bump map, but after some testing, I´ve realized that for the scale of detail that I wanted, a checker map would give me the same effect that a non-procedural texture would, with the advantage of easy adjusting 
And thanks again everybody for the comments, critiques and for enjoying the work
Ricardo
