First line of the first post:
This mod deactivates the flat shadows of practically all scenery objects (notably trees/forests and buildings) within DCS World, only leaving shadows for own aircraft and surrounding objects such as ground units and other aircraft.
Doing this tries to strike a balance between still having some shadows and saving FPS by eliminating scenery object shadows. Pretty clever way to save FPS and retain looks but I don't think Mustang is supporting it anymore.