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1. 

   ehtyeci

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   28 July 2018, 9:56PM

   For metallics make sure you use very dark and bland palettes for diffuse. Most of the brass color should come from cubemaps that suit brass, like MetalBrushedBronze01Cube_e.dds or MetalBrushedGold_e.dds.
   
   The reason you want dark diffuse is because how it is interpreted as a non-falloff color by the engine. Metallics use extreme Fresnel falloff, which diffuse counters. Instead, much of the shine and color will come from specular and cubemap. Bethesda already made nearly all the cubemaps needed for the metals that exist - and you can also compensate with a very, very slight tint on the diffuse to get whichever type of metal you want.
   
   1. 

      Mythos214

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      29 July 2018, 12:40AM

      Agreed on the diffuse maps, in fact a good base color to use would be a dark brown or dark reddish (brick colored) brown.