It's working here. Do you have enough Octaves? Maybe it's a Scale issue?
Hi Lee. Default noise and others are working. Try to use cells1 or cells2 as Pattern
Yes, you are right. We'll look into it (@Stephen Blair).
Meanwhile, you could maybe try using displacement with a small amount of Scale.
Thanks Lee.
I'll try but i need to create Carbon Brake disc, not ceramic or carbon fiber. The disc came from a CAD , with displacement i have no control on edge dilation, i need to reconstruct the discs, but i want to concentrating me on shading. Anyway mixed with aiComposite, the cell doesn't affect the bump but the specular is good.