How does DCS render reflections?

[==Wiggy==]

Is it cube maps? A hybrid? I'd like to.edit the texture(s) it's using. Specifically for the blue sky. It's way too dark. A slightly brighter hue would work better at rendering metal parts. Obviously it would.be much better if DCS simply switched to a self reflection type rendering like IL2. But for now does anyone know where those textures are located and or what they are named? Or can explain how.the reflections are actually created?