Lee Elliott wrote:

Is specular here referring to the specular high-light colour? Specular colour, in that sense, as i understand it, is going to be dependent upon the colour of the direct light source and the colour of the object that filters it, so it makes some sense to me that the sun (or moon) colour figures into specular.

Yes, that was my idea also.
And it shows at dusk and dawn where the yellowish sunlight reflects yellowish on the (white painted) aircraft.


I'm not sure about the distinction between ambient and diffuse here. I'd say

Me neither, that's where every bodies opinion starts to count ;-)


that ambient should be everything minus direct - basically white minus the sun colour, and I'd guess that diffuse should be a combination of the two

I think that would make it very dark, but I haven't tested it that way.


with a bias towards the direct colour as this is second order reflected light, much like the sort of light you get on an overcast day (you actually get more accurate colours in photgraphy in an overcast than in sunlight).

That might not be a bad idea. At this time I thing it reflects too much blue due to the fog color.


Anyway, in practice it's difficult to assess true colours as our eyes, or minds rather, do a pretty good job of correcting the the colours - for example we don't easily detect the colour casts from either incandescent or flourescent lighting with our eyes but it's very apparent in a photgraph - hence specific films for daylight, incandescent and flourescent lighting.

Well, it is very apparent if white aircraft are completely white all over, even if it's fully dark outside. So we should be able to get a decent improvement.

Working something out for FG will be a tricky because it won't look right unless you match the brains interpretation of the colours, which as I said, is 'normalised' and not accurate.

Unfortunately not. But I guess every simulator has this problem (and solved it by trial and error at best).


Erik


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