Re: [Celestia-developers] LOK mask for extrasolars / Mercury texture

[Fridger S. <fri...@de...>]

Grant,

as to "grayscaling Mercury":  

I see two different alternatives:

a) Try to do a best guesstimate  coloration for Mercury  
(gray-with-a-tint-of-brown),  but  switch  to  a grayscale  Mercury 
when  the  LOK  mask  is turned on

b)  grayscale  gray looks  quite a lot more dull  than  RGB  "gray", 
since many facets of nearby tones produce a much more lively image. I 
would strongly vote for RGB gray, of course such that 'scientific rigor' 
may still be pertained. A lively RGB gray coloration may easily be 
cloned from other images...

Bye Fridger

PS:

Each time I look at the distribution's Saturn texture on my laptop, I am 
reminded that it is far from perfect! Too pale, too blue etc...We could 
do MUCH better nowadays,  given Cassini's imaging...

Grant Hutchison wrote:

>After some discussion on the forum, I'm keen to add simple, uniform grey lok
>masks for extrasolar planets, as a means of telegraphing that we know
>nothing about their appearance. This would involve adding a tiny grey jpg to
>the lores textures and writing an AltSurface for each defined object - a
>simple addition to the code I use to generate extrasolar.ssc. This seems
>uncontroversial, but I thought I'd give notice of intention in case anyone
>sees a downside.
>Also, would their be any objection to greyscaling the current Mercury
>texture and lok mask? I've tracked down visible spectra for Mercury's
>surface and they're definitely comparable to the Moon - slightly greater
>reflectance at the red end, but certainly grey-with-the-merest-hint-of-brown
>rather than the lurid shade we're using currently.
>
>Grant
>
>
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