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[Substance Painter-UE4] Metallic and Specular export process?
Hey, I'm really enjoying substance painter right now. However I'm confused as to how I can export Specular maps for UE4. IN SP the only shader option I have is Metal-Rough, from my UE4 understanding metalness is not what I want as I've been painting specular maps. In the export options there IS a gloss-specular option… -
Re: [Substance Painter-UE4] Metallic and Specular export process?
Substance painter on export has the option to export packed maps for various engines, including ue4. I assume that's what you meant by 'metal-rough shader' in your OP. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
So in substance painter, what would a typical export look like for something like clothing? Perhaps with blood on it. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
Ye, cheers. : ) -
Re: [Substance Painter-UE4] Metallic and Specular export process?
uh... an albedo map with the cloth and blood colour, a black metallic map, and whatever roughness values in your roughness map? -
Re: [Substance Painter-UE4] Metallic and Specular export process?
specular in UE4 is a multiplier on the internal value of 0.04 for non metals, that's all. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
But for clothing I would use a specular map and roughness map. Is this incorrect? I would only consider using a metalness map if I was making something like a gun. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
Metal should be used to denote metal or not-metal. Basically black and white 99% of the time. Variances in reflections should be done through the roughness map. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
But I though specular provided a range of reflectance while metallic only had two states, metal or not. -
Re: [Substance Painter-UE4] Metallic and Specular export process?
You will likely run into trouble because cloth breaks the assumptions of the shading model. Clothing has a very different distribution to its specular reflection than most materials due to being composed of tiny translucent fibers. Ideally you'd want to use a custom cloth shader that fully models these, but aside from that…
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