I dont understand why Metallic parts of my van are black in UE4. I know how it can alter by using spec/gloss in painter because UE4 uses Metal/rough. So i am defeinitely using metal/rough in painter. I am also using “bonaficio aragon stairs” environment map in painter because its at the seasisde and my scene is also at the seaside.
Have you painted the albedo of the metal parts in a bright colour? UE4 doesn’t treat metal like raytraced renderers, so you need a bright colour (usally a light grey or white).
In particular, every inch of your level needs to be covered by at least one reflection capture, or you will have areas with zero specular, and metal only has specular with no diffuse due to the physics of light.
If you already have some sort of ambient specular source in the scene(SkyLight, Reflection Actors…), then it’s down to your textures and/or material.
Your metals need to have a Base Color value above 180 sRGB and they need to have pure white in the Metalness. Also make sure your RMA or individual Roughness/Metalness/AO textures have sRGB disabled to ignore gamma correction.
There’s PBR charts online everywhere. Just Google pbr chart, for metals in particular you need to stick to the values on the chart if you really want metals to look accurate.