This is a volcanic material. The file contains a sphere with the material on it. If you have any trouble with the material please contact me, and maybe I can help you with your issue. If you enjoy this material please give them a like, a good review, and visit my store where I have many models for sale. If you have any questions about this asset, or about anything in my store, please contact me. If you have any issues please do the same before leaving a bad review, because it may be a simple mistake that I can try to fix. I would also love it if you would share any artworks that you use this material in with me.