The seashell was made using photogrammetry from a real seashell and its texture. There are two versions of the shell, one is a low-poly version, the other is a high-poly. Both versions of the model have color, normal, and bump textures. All textures are 8k in size.
Low-poly model - 10,000 polygons.High-poly model - 169029 polygons.
Also in the C4D version there are materials with textures.