I'm with Piperarcher on this one. There is quite a lot of glare on the black cockpit surfaces, which will cause the underside of the cloud to appear to be very dark.
Given the comparative brightness on the horizon I suspect this is all about how the pixels and eexposure have been treated, not a thunderously pitch black CuNib.
If it were genuinely that dark - not a chance, but I suspect it is no worst than the average large Cu on one of those mixed days.
Last edited by gasax; 7th Jun 2013 at 14:53.