Editing Main Render Settings (section)

=== Metallic ===
The metallic map is a single channel map (ie. red) that determines how metallic the surface it.

Metallic surfaces reflect light rather than absorbing and re-emitting it. Because of this, if the material is set to be metallic, but "Reflections" are turned off, the material will appear to be very dark because there is nothing to reflect except the lights in the scene.

Note that the fur uses a simplified approximation of metallic lighting, and will not match the appearance of the skin which uses Unity's standard lighting functions. The fur only takes metallic texture samples at each vertex, which are then averaged across the surface of each triangle.