t00fri wrote:PlutonianEmpire wrote:I messed around with the atmosphere values for Titan's Mie atmosphere. The deep blue seemed ridiculous.
The deep blue haze extending above the orange smog is of course not ridiculous.
Which is why I used the word "seemed".
I had several instructive mail exchanges about its existence and its visual appearance with the Cassini lead scientist before implementing it into Celestia.
Here is a (true/natural) color photo by NASA
http://www.space.com/14053-titans-orang ... close.html
Credit: NASA/JPL-Caltech/Space Science Institute
and this is the comparison with Celestia.1.6.x
Note: Removing the orange smog by hitting the 'I' key shortcut makes little sense without also switching off Titan's atmosphere (via CTRL+A) at the same time. Without removing the latter, you indeed perceive an unnatural display of the remaining deep blue haze around Titan that is too intensive visually! Such (partial) displays have no relation to reality anyway. Their only purpose is to enable a glimpse on Titan's surface morphology without actually using 'infrared filters' to penetrate the orange smog.
But nevertheless, look at this close-up (UV enhanced) photo of the layers of Titan's atmosphere by the Cassini spacecraft
http://en.wikipedia.org/wiki/File:Titan ... Layers.jpg
Imagine to remove just the orange smog in the lower part of this close-up and you will retain an image not too dissimilar to what Celestia gives after just removing the orange cloud layer (i.e. by hitting the 'I' key)
I think you also worsened the backscattering appearance of Titan in comparison with
what I implemented into Celestia. Its close resemblance with real Cassini photos
has been amply discussed in previous shatters.net threads:
I think I faintly recall from past discussions that Celestia is intended to give the user a "naked eye" experience, meaning space is shown as it would appear to the naked eye. I also faintly recall a statement saying the blue haze in Titan's upper atmosphere is probably not visible to the naked eye. I took both these into account when modifying Titan's atmosphere.
I could be wrong though.