Question

What is a metal map?

Answer 1

A Metallic, or Metalness, map, is a black and white texture that acts as a mask that defines areas on a texture set or material that behave like a metal (white) and do not (black).

Answer 2

It is a black and white texture that acts as a mask that defines areas on a texture set or material that behave like a metal(white) and do not (black).