The VGM affects how Vectorworks generates and presents 2D and 3D geometry. In version 2019, loading tons of geometry could slow down your computer, especially on larger projects. Users occasionally reported slow frame rates when panning or zooming, and often loading files could take longer than anticipated.
The update for 2020 addresses these issues. The software will seem more realistic — as you zoom out, you’ll notice less and less detail on geometry, mimicking the way the human eye operates. As you zoom back in, geometry will load with its customary high level of detail.