What is the % used for ?

[t00fri]

Then the second table may be usefull after all, depending on the monitor used. Actually, I've found that the enhanced colors are pretty on my monitor, despite that they appears to be a bit too strong for my taste (not very realistic).

In practice yes. But theoretically, our monitors are supposed to be calibrated by some standardized reference profile. Then the color table would carry more significance physically. We know that there are physical corrections to blackbody colors as function of temperature. Such a table could account for this and many similar such effects.

Bye Fridger

[Cham]

Chris, please,

tell us what is the content of the second color table.

[ElChristou]

It would be good to have some kind of message displayed on the key press to tell you which table is which!

Yep, I asked this a long time ago in the dev list, but as nothing came out I suppose it's not a so important feature...

Sorry . . . You should file a bug on the SourceForge tracker so that the request doesn't get lost. It's a very easy fix, I just need to remember to do it when I'm working on the Celestia code.

--Chris

That was a long time ago, much before this tracker new stuff; to be franck I won't do bugg report anymore because it seems my config is too obsolete in front of the global philosophy for the rendering (adios old paths, welcome to OGL2 new word ). The only stuff I'm interested to see quickly fixed is the problem again with the seam on meshes after mapping in 3DS; as I don't know if it's related to the Cmodtool or Celestia's engine I suppose this request still belong to the forum, or not?

[chris]

Chris, please,

tell us what is the content of the second color table.

One color table is based on the black body spectra of sources with temperatures of the different stellar classes. The standard illuminant D65 is used as the white reference. The other (default) table is more subjective, with the colors modified to account for human color perception. There may be a more scientific way to approach building the default table; I'll entertain suggestions.

Of the two color tables, the D65 black body table is more physically accurate. It has the disadvantage of not conforming to certain expectations though, most notably that G class stars like our sun appear slightly pink instead of yellow.

The two tables exist to give a user the choice between physically-based and familiar colors.

--Chris

[Cham]

Then which one is which, in Celestia ? There isn't any feedback when you use the key.

[chris]

Then which one is which, in Celestia ? There isn't any feedback when you use the key.

Obviously, there needs to be some feedback. But, the more saturated colors are the black body colors. They could be desaturated to make them more realistic: distant stars appear less saturated to the human eye because we're less sensitive to color at very faint levels of illumination. And bright sources of light like nearby stars will tend to saturate to white. The current black body color set is normalized so that the most prominent color component (red, green, or blue) is one.

--Chris

[Cham]

But, the more saturated colors are the black body colors.

Ahaa ! I presumed it was the reverse. The onscreen feedback is then absolutly necessary. You should add it, before you forget it !