Why my metallic materials get dark?

Its probably because you dont have a reflection sphere

All my materials where i put the metallic parameter on (also small amount) getting very dark after light build. Why? And how to prevent this?

you need some reflections to get it work.
Screen space reflections or reflection captures.

Also I suggest you to add a «skyLight» to your scene to give more color to metallic material. (don’t forget to use «reflection sphere» (or other type if needed).

Hi All,

Thanks for the answers. A skylight I had already, and reflection spheres are no option in my scene. But the solution of the Screen Space Reflection i did not know yet. Now they look better. Thanks a lot!

Just be aware that Screen Space Reflections are quite expensive.