I am NEW! Got a Question

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Celestia Fan

I am NEW! Got a Question

Post #1by Celestia Fan » 07.06.2002, 07:11

Hey all, my name is Brian Martin, this is an EXCELLENT program.. one thing though, I noticed when I downloaded Celestia Version 1.2.4, Thee earth looks kinda cheezy... I saw a new Reflected light Earth on the galley, any chance I can get that? :D


Post #2by Guest » 07.06.2002, 09:53

I wouldn't say the Earth looks cheesy, but there are lots of places you can get higher resolution textures, for example :
Make sure you resize the texture you download so that it measures 1024 * 512 pixels, or a whole number multiple thereof. Don't ask me why this is, just one of Celestias' (few) quirks I guess.
Re reflected light : I too would like someone to explain how to do this ! I notice it's apparent in the second hektor mesh, but nowhere else.

(Mad Boris)

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Post #3by Sum0 » 07.06.2002, 11:09

You need a good graphics card - eg, Radeon or GeForce, and then you need to switch on pixel and vertex shaders. You can save a reflectivity map in the alpha channel of a PNG file, which stops unslightly reflective land.
Orbiter (another space sim), however, has a reflective Earth on any graphics card. Why does Celestia need a recent card and Orbiter doesn't?
The Hektor mesh has (I think...) refectivity "built in" to the mesh, which, I suppose, would mean you could make a reflective Earth mesh without the need for a fancy graphics card.
BTW, bump mapping clouds in Gimp makes them "stand out" from the surface of the Earth. It's really cool - it makes them look like they're actually above the surface, rather than part of it.
"I have been asked, 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."

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