I know we are limited to one matcap per comment but I can’t post anymore because I am a new member.
Mud matcap:
https://drive.google.com/file/d/19lQuNb_PvBkJbvnGojVhK2bsJHyqo2YV/view?usp=sharing
Resin matcap for 3D printers:
https://drive.google.com/file/d/1G0ciLtkv9PU5dXUxH51iVwnqKlZorR5f/view?usp=sharing