Why is BeamNG so laggy?
Number one, if your pc has chrome tabs running in the background or something else running behind. Get rid of everything running in the background and just run beamng. See if it still lags. Remove some mods, too many mods can cause the game to become unplayable. Update game software and graphics drivers regularly to help resolve performance issues. Try turning down shadows, reflections, and lighting options in the in-game settings menu to raise FPS. Consider upgrading your GPU and CPU for a smoother experience in the latest games.