Some new metals

[Hannes]

Here are some new completely procedural (path tracer-!!) metal materials made entirely from scratch.

By the way, the ground shader is a mix of two merged PBR materials, one from cgbookcase.com, and the other one from Quixel.

[Hannes]

I used a transform input shader with "use world space" checked before each PF to override any existing UV mapping of objects. Otherwise it may look a bit weird.

[masonspappy]

This is great. Thanks Hannes!

[Dune]

They look very good. Very handy. Thanks very much, Hannes!

[sboerner]

These will be very useful. Thank you, Hannes!

[archonforest]

Great stuff.

[WAS]

Awesome stuff, though maybe the gold needs higher spread. Gold is pretty bright under sunlight. I haven't seen a gold bar under sunlight by gold panning, those fleks and nuggets light up like yellow under the sunlight cause the reflective spread seem high.