Just made a new medieval pot helmet and I'm trying to get shaders perform like the photo's in the previous post, but it's pretty hard. Most are a mix of no-RT and RT-reflection based on silver with the index at 7. But I think these helmets are not silver but steel, so slightly different. I think I come close with 4 and 4B.
It's also difficult to add dirt/wear/corrosion after a very reflective shader, it won't be visible easily, so a merge is needed.
This is the standard renderer, btw.
What do you guys think?