Kerbal Space Program

I can confirm such surfaces are practically on all bodies. I have personally met them on Minmus, Mun, Duna, Moho, Tylo, and Bop. They make nighttime roving extremely uncomfortable.
Even worse thing is that these surfaces have often other effects, such as pulling the rover in strange directions (such as uphill).

If someone can try to make a sort of map of the polygons which are affected, a pattern might be able to be deduced.

Anyone happen to have a link to the description of how planet surfaces are rendered?

EDIT: Possible link to #2508, both from same author relating to lighting issues.

I did not ever try to map them but from my experience they're very irregular. For instance, surface where Minmus flat smoothly transits to a steep slope was unlitable. No visible edges there. Or sharply cut polygon near Duna pole (not sure if north or south but I can find it easily if needed; image here: http://i.imgur.com/9y5b6TI.png, the rover has four lights shining on the surface, yet nothing can be seen on it).
To me it seems like they are "filler" polygons between larger scale structures.

And I am pretty sure this is completely different issue from #2508.