Materials and textures.

There is a metallic effect... it's rough to draw!

By the way, look for topics from the respected comrade zahar0z - he uses a sophisticated editor to create textures - you'll automatically get the roughness!

I meant, can this be connected separately, or should it all be on one texture? Because when I was browsing the game's folders, I noticed that there is only one texture per model.
So, if I have several textures for a model (diffuse/base color), (metallic), (roughness), can I only connect one?

In general, this is what interests me.

And the sophisticated editor for creating textures is this program (as I already wrote, I don't know how to draw, but you don't have to draw in it, you can use already created materials with roughness)