stat FPS / Displays an FPS marker and Frame Time
r.fog (0/1) / It removes all the fog from the game, it does not make a big difference in performance, but it is worth quoting.
r.ViewDistanceScale (0-*) / Changes the rendering distance of some objects such as Trees, Stones and Foliage / Use 0.1 in your factory, and "1" while traveling.
r.ScreenPercentage (0-100) / It changes the 3D resolution, not affecting the GUI. / Have a monster impact on performance.
grass.Enable (0/1) / Enable or disable grass. / Use "0" in your Factory and "1" while traveling.
foiliage.DensityScale (0/1) / Change foliage density / Use "0" in your Factory and "1" while travelling.
r.Streaming.MipBias (0-10) / Changes the quality of textures. / "10" is a safe value to use.
r.MaxAnisotropy (0-8) / Limit MaxAnisotropy quality, use multiples of 2 only / Use "0" to disable Anisotropy.
r.SkeletalMeshLODBias (0-2) / Changes the quality of the polygons of some buildings. / 2 give the best performance.