This is a watertight horse model constructed with all-quad topology, subdivided and sculpted with multires subdivisions in ZBrush, Textured and baked in Substance Painter. It's designed to serve as a basemesh for posing, sculpting, and 3D printing, perfect for use in games, with the base multires level being lowpoly consisting of only 1,370 faces.The normal map is baked from the highpoly onto level 1 multires mesh.
The eyes are separate meshes with their own UV map and texture set. Eye textures are baked, but "Tiny Eye" procedural shader is still available, just connect it to the output in the node editor.
The current version (1.0) features single-tiled UVs with greater texel density allocated to the head islands. UVs might be updated as well with UDIMs and alternative mapping.

Version 1.0 isn't rigged.
Blender does not yet support shape keys on multiresolution models, so multires, and a rig with shapekeys won't be compatible with each other. Future updates will include a workaround solution to this issue.

Breed types will be done through shapekeys or different meshes sharing topology and UVs for coat color compatability.
Coat colors will feature options for different markings.

The next update will focus on new coat colors, anisotropic textures, eyelashes, and hair.

The final goal is to create a horse model with every part of it customizable and suitable for any need.