Besides from the shaders I created this little bonus video.
Note to you. The scaling of the textures in the shader is 1, so you can copy this one and use it in other projects. But keep in mind that the texture in C4D is very much scaled.
Here are the files to download (minus the ones which I am not allowed to share)
https://www.dropbox.com/sh/8iju0eoaem75ng7/AAA8tfR-8ASA4Lv_I1B4gUILa?dl=0
Also for people who are new, get yourself one of the best HDRI packs: https://www.maximeroz.com/hdri-free-pack