This was a map I extracted from the Garry's Mod Workshop. The Creator is Youmu Kompaktu/RedMser.
I had nothing to do with the development of this map, I just extracted this from the workshop. It works flawlessly in Source Filmmaker as far as I'm aware. Tested it a few times & no missing textures that I could find. There's an issue with some floating rocks that the creator never fixed, but they're minimal.
Since we have a lack of Forest-like maps I figured this would be nice for some people to use. There's also a small water-bog area. It's also dark, so it works well with lighting effects.
The file is just the map file itself, which is all you need. just put it in the "C:\Program Files (x86)\Steam\steamapps\common\SourceFilmmaker\game\usermod\maps" folder and you're good to go.
Note from the creator: "About what is included, I tried to put everything in but there still was some stuff somehow missing, so I didn't specify and just kinda hoped it works for people... I used models from a ton of sources, some I don't even remember, so I couldn't be specific on stuff. It should work with EP2 only though!"