What Substance workflow + export settings would you use to get the best results in UE5 using the new Substrate materials? Mainly to prevent 'white fringes' problem that was common in the UE metalness workflow around gradual transitions between metal and non-metal materials like dirt and paint? So basically a 'specular' PBR workflow like in Marmoset instead of the clasic 'metalness' UE workflow and using grascale instead of a black/white map to indicate 100% metalness or 100% non-metal surfaces.
If you use the metalness workflow in Marmoset you have almost the exact same problems as in UE. But if you use the 'specular' workflow in Marmoset, material transitions between metalic and dirt/paint etc do not result in those artifacts on transitions. So maybe with substrate it's now possible to get similar results in UE5?