Great! It's this kind of detail that often makes a difference in the realism created in a scene. And such stuff is also very time consuming to come up with, which is why it makes sense to have snippets like this saved up in a library, which eventually can be used to 'quickly' put together something. I wish it were easier to manage though in the UI, I am still struggling with complex node networks, no matter how well you group them and label them. The whole thing becomes a mess when you add a few nodes via the menus and dialogs and having to constantly organize the network is not fun.
Thanks for sharing your work.