The Forest 2014 Manual PLP Instructions
Game looks perfect, except DOF is amplified (see screenshot; looks better disabled, in-game). Hor+; FOV, HUD, text & menus are proper (HUD element-positions span full width).
(PLP screenshot with bezel effect. DOF is ON)
SoftTH (fullscreen, DX9 x86). In launcher/game select massive resolution.
(DOFF OFF, notice crisp axe)
(1080p, DOF ON)
OR Borderless: Shortcut/launcher argument -popupwindow (makes native borderless). In launcher/game windowed. ShiftWindow (fullscreen resolution & to position).
In-game FOV slider (not needed, untested).
(inventory, notice red beyond render)
View guide for general help with the instructions.