The scenery looks better textured to me with those texture settings both in Mann Gulch and Machu Picchu. Maybe it’s a placebo effect!? I’m thinking of bare rocky or very dry grassy surfaces. I’ll double-check my observations and try to screen capture the difference, if possible, much later today. Are the graphics mechanics just carried over from FSX, described in the SDK (it’s so incomplete, it doesn’t seem likely!), or was it figured out by “reverse engineering” as to what the texturing affects in MSFS?
Edit_Update: In the following composite .JPG illustrating texture supersampling, one can see distant parts of the runway area beyond ground decals change when one swipes one’s mouse cursor from right to left across the picture. Seems to apply to grassy textures, too, in the airport composition scheme of things.