The model and scene file are created with blender 2.79, but I have confirmed that it works fine with the latest version 2.93.4.
.blend file includes high poly object used for baking normal map texture.
it has simple rig, you can change it easily.
slug model has level 2 subsurf modifier.
textures for slug model: diffuse, roughness, normal. basic pbr material.
i hope you like it.