How to make wall insulation, like rockwool?

Want to make that fluffy insulation you put in walls but haven’t a clue on where to start?
Its a close up so would have to be fairly realistic

I think that is a difficult task.
I would go for a photo texture and adding a displace/bump map and rough map for it, then put a hair particles on it for some fibres.

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Maybe have a look here …?:

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