Real Materials documentation [v3.1 from November 2019]

Here are some useful links:

Important notice: keep track of free disk space using Unity Asset Store and "Real Materials".
  1. Since two new render pipelines were added (HDRP and Universal) on top of Standard (Build-in) and lack of support of separate downloads for pipeline-specific assets in Asset Store there is a potential place for a problem with free space. Summary all 8 volumes of "Real Materials" series have a size of 25GB (!) because each volume contains 3x of assets (for HDRP, URP and Built-in rendering pipelines) and all those 25GB of assets stored here:
    C:\Users\*your Windows user name here*\AppData\Roaming\Unity\Asset Store-5.x\ (for Mac it's here, for Linux it's here)
    Each asset you ever downloaded from the Store has a copy in this folder and it's never cleaned up automatically. So, if you have troubles with downloading or unpacking "Real Materials" files in Editor - delete everything from that folder and try again. Hope Unity fix this someday, but for now it's how it is.

Useful tips for metal materials usage:
  1. Rich & contrast environment reflections are the key for the good look of the metal surface. Example - same material, same mesh and only environment reflections are different:

  2. Strong highlights from light sources are needed for proper metal look&feel:

  3. Bare metals looks poor on large flat surfaces. Bends and other geometry details are needed to improve situation:

  4. Colored metals (brass, copper, gold) can't reflect blue color and become dark. Example of this with overcast sky VS default clear blue sky:

Minimal supported Unity version for "Real Materials" series is: To use "Real Materials" with previous versions of Unity create empty Unity 2017.4LTS/2019.1 project and import a proper "Real Materials" package. Then close Unity and copy "Real Materials" folder from there to your old Unity project. This way was tested on: