Ok, so it seems like its specific to the kind of grass, I moved the plane to italy on a nice grass strip, and there it works fine.
But in the grass I was finding in fields in the western US, no joy. So it seems like they apply that effect only to certain vegetation… Weird…
I’m still not seeing dust, but maybe the correct type of dirt only exists in Europe… heh…
EDIT
Found dust, Ok… I’m happy now, I’ll probably never see it again, as usually in cockpit, I just was starting to think maybe they disabled it at the last minute or something.
Thanks again.