Sorry for the silly title.
The atmosphere disappears in certain circumstances in Celestia v1.6.0. This bug affects Venus, Earth, Mars, Jupiter and even Titan. It is clearly visible when we are landed on the lit side of the planet.
Here is a link so you can test the bug on your own computer. Mine is a PC running with Windows XP SP3, RAM 2 GB, Nvidia 8800 GTS with not so old drivers. The display device is 1280 x 1204 px.
cel://SyncOrbit/Sol:Saturn:Titan/2008-1 ... rc=0&ver=3
We are on the surface of Titan and Saturn is above the horizon, hidden behind the thick clouds. But it is selected and if markers are enabled we can know where it is.
Now drag it slowly with the mouse from the top to the bottom of the screen. When it comes about to the middle of the screen, atmosphere and clouds disappear and Hop! Saturn becomes visible. If we continue dragging, re-Hop! It disappears again.
Funny!
According to that I have found this is only dependant of the Field of View and of the elevation of the center of the screen view above the horizon.
For example, if the FOV is 35°34’ (my default FOV) the atmosphere (and clouds if any) disappears when I look at about 28° above the horizon. This is not dependant of the sun’s position and if I change the display mode resolution, it is always the same. I may be in mode follow, sync or chase on my planet and no importance if an object is selected or not.
And it is not a bug of the mouse. Il may happen for example by automatically tracking the Sun from the Earth’s surface.
Here are some values that I have taken, just to have an idea.
Code: Select all
FOV Elevation
------------------------
5 4
10 8
15 12
30 24
60 43
90 59
120 70It is a little bug and I wonder whether all this amount of details is relevant or not. Let me know.
