I have now improved the file of my Rust Stone Shader.
The picture for the left image shader (background) I have attached and the main picture as a link, because it is too large to post.
Both are free images of Pixabay.
You can mix the two pictures with Picture Mixer 2.
The projection of the images can be adjusted as desired.
The images used are only examples, you can of course like to use his own
Main picture:
https://pixabay.com/de/photos/rost-metall-alte-grunge-textur-451324/