[caldrail]

The sky is a mix of the original IL2 screenshot plus an overlaid photograph of a wintery but sunny sky, which is why there's an incorrect 'lower atmosphere' cloud in the screen centre. That was actually the easy bit in making the pic. The contrails were layer after layer of effects and expansion (hardly any of which did what I wanted) and as for picking out the stray pixels on the added bomber stream... AAAAARGH!