Substance Plugin no longer required! Now includes the three variations as Unity Standard Material Prefabs using png textures.
So dastardly in life, not even death could rid him of his evil ways. No surprise with a chin like that!
Substance is supported natively in Unity 2017, but you will need to install a free plugin for use with 2018 or later.
This stylized, sculpted skull comes with 4 LOD meshes, each with its own customizable Substance featuring the base PBR channels, as well as extra maps like curvature, position, world space normals, material masks, transmissive(subsurface) and ambient occlusion.
The Substances for the different LODs all offer the same map types & parameters and a preset made with one of them, can be applied to the others. (Preset functionality depends on which Unity version/software you use to customize the substance.)
Have fun with it and let me know about your projects, wishes or feedback! I appreciate it.