Beta 1 fog was at 18,000 units. I moved beta 2 in at 16,000. I did this to compensate for additional details and to try pulling up the FPS across the map. Although 18,000 looks better, I don't see that a shorter distance changes much. I did, however, move it back again to 18,000 for the next release... and I constantly debating that. Not sure where I will leave it. More details and activity requires some compensation and fog is one way to do that. Performance to me is far more important than looks.
EDIT:::: Upon further review and consultations with the Commisar (the wife) I re-focused my eyes on the trench wall texture and realized that if you change your point of focus, it is indeed upside down. But just for kicks, look at it in Beta2 and refocuse your point of reference and it will look like the filler/caulk/whatever is indeed bulging out.