Keep this between 75% and 100% . Going above 100% (supersampling) drastically increases GPU load.
Always ensure the game is in Full Screen , as windowed modes can cause input lag and lower frame rates. ETS2 – FPS INCREASE GRAPHIC MOD V4.5
Reduces the complexity of far-off textures and objects to lower GPU usage without sacrificing immediate visual quality. Keep this between 75% and 100%
Tweaks shadow rendering to be less taxing, often a major cause of FPS drops in cities. ETS2 – FPS INCREASE GRAPHIC MOD V4.5