4 Forests is another experimental album by Brian Dougans under the alias Part-Sub-Merged from 2007 which was released on The Future Sound of London's digital download website. It is the soundtrack to a short film made by the duo called Part-Sub-Merged to be released on FSOLdigital.com at some point in the near future. The music is darker than his Polemical work with analogue techno beats and synth ambience.