Metal is actually pretty easy to do with PBR. Since metals generally reflect almost 100% of light that hits them, you simply need to make your specular color the final color of reflections you'd like to see. For example, you'd want a light pinkish color for clean copper, or a bright desaturated yellow for most types of…
Off the top of my head ;) [ame]https://www.youtube.com/watch?v=LpLBzV9uG0Y[/ame] Texturing - Traditional Shaders to PBR Shaders: http://www.marmoset.co/toolbag/learn/pbr-conversion General Rules: Only colour Info In Albedo, no more lighting info overlayed (AO, PRT etc.. although depending on style, some cavity can be…