Hi there,
Thanks for reaching out. I am afraid we currently have only one texture for a Pencil. However, this is great feedback, and I have passed it on to the product team. They might consider it for future release. Also, I would suggest if you could also post it here ( https://adobefresco.uservoice.com/). This way, you will keep getting all the updates related to this feature, and other users can also upvote, which would help us prioritize. Also, this is the best way of communicating with the Engineering and Product teams regarding issues and suggestions so they can be implemented in future releases.
Regards,
Anshul Saini