This is not a deep/wide look at a grading technique using FilmBox, just a glimpse at one way of adding the plugin into the node tree, and some of its features. Hope this helps! Thanks - matt
Filmbox: https://videovillage.com/filmbox/buy.html
Tetra color DCTL: https://mononodes.com/color-shift-dctl/
Film Density DCTL: https://github.com/baldavenger/DCTLs/blob/master/DCTL_OFX/Film_Density_OFX_DR17.dctl