Re: [Flightgear-devel] Moonlight

[Edward d'A. <tru...@gm...>]

On 28 May 2017 at 18:05, Thorsten Renk <tho...@sc...> wrote:
>
>> By the way, this sounds like the color value is exceeding 1.0 which can
>> cause this type of behavior in OpenGL.
>
>
> I think this is unlikely in this case. First, while the moonlight *property*
> might take a value above 1, the corresponding light color value is much
> lower (I think max. 0.2 in a channel) - so you'd have to make the property
> really large to get an overrun in the color value.
>
> Second, as a precaution, color is clamped to [0:1] before multiplying with
> the texel in all shaders (and also the brightness post-processing filter
> clamps fragment color).

I think I found the cause, starting at night time with ALS on and
--enable-freeze:

$ fgfs --airport=KSFO --aircraft=UFO
--start-date-lat=2015:12:11:02:29:00 --altitude=1000 --heading=90
--enable-freeze

Unpausing instantly fixes the rendering!

Regards,

Edward