RoF have lots of settings which greatly affect final image: 4 different settings for HDR, high contrast post effect, desaturation, bloom effect, sharpening post effect, light and color reflection. Manipulating them you can get image ranging from dull and washed out to something "explosive". Turning everything on does not guarantee the most natural look.
I think it's time I gave RoF another go, heh. If anything, it can be the salve for my uncomplicated-aircraft-combat itch for the time being. When you spend a lot of time flying in DCS, flying something that doesn't require a 800+ page manual is nice.