Repro for extra dark night (1st attachment (2nd compares)):
Start up Night Showcase
Look towards lighthouse, helicopter, and moon.
At some point as the boat approaches the coast the screen should begin to flash between regular night and an almost light-less night
Repro for floating vegetation (3rd attachment):
Ensure plants and veg are turned on
Create light sources in the world near vegetation (only two chemlights and some flashlights caused this in my experience)
Continue until white floating vegetation appears
Blue NVGs (4th attachment):
Create light sources in the world until NVGs break. (4-6 or so chems, a pair of APC headlights, a world floodlight, and maybe a few flashlights in my experience)