If you render a red material with glossy, that's how it will look, basically. Ghostships shader is a different implementation of a PBR shader, with different inputs. it will probably be easy to replicate things with the Physical Root Node, if you know how to handle things like metallic. Since both should work with PBR maps, both should give very similar results. But building such a shader from scratch or looking at the internals helps (at least me) to understand whta's going on and how things are done.

The main idea is to use a set of maps which defines your material, with things like roughness, metallicness, bump and normal. There are some sites which sell or give away texture sets for physical based rendering. And the results can be pretty close to photorealism, even on a very coarse mesh.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

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