Here's the file as promised. Tweak away!
A simple and effective setup ... thanks for sharing ... :D
I still have not THE point about the image shader, as you are using Through Camera projection.
I would normally use this technique to add some dust and dirt to a too clean render, but I cannot tell if this is your purpose, as I have not seen the image you used :)
Thanks 8)
Thank you ! :)
Cool. Thanks Kevin.