Make a "mode" section of beamNG that has custom physics, light rendering, etc. for each mode For example: FULL DERP MODE Where gravity is always changing and light is always similar to a disco ball that loves to put "epilepsy warning" to the test! Just my suggestion.
That'll be up to modders to create. "Derp mode" lighting is possible in a custom map. If somebody felt like it, they could probably make a UI app that randomly changes the gravity as well.