franks?
no it's rex 2 ground textures 
Yeah Frank Dainese of SIRX2009, what other well known Frank is there that makes photo real ground textures for Switzerland, Italy, Austria and Slovenia?
I wasn't sure if those where his work or something else.
However, their not REX since REX doesn't make ground textures outside of the aprons, runways, and taxiways.
Simply put, what ground textures are you using in the screen shots? Not sky textures since I figured they were either FEX or REX, but the ground textures.
