3/4 cloud map

Tips for creating and manipulating planet textures for Celestia.
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Adirondack M
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3/4 cloud map

Post #1by Adirondack » 24.07.2008, 09:48

I was trying to build a cloud map (2048/1024). Well, that worked fine, but it does not work as expected on planets with Celestia.
When I apply my cloud map to the Earth (or any other planet), only 3/4 of the planet has got clouds (= 1/4 without clouds).
It looks like the planet is wrapped only 3/4 by the entire cloud map (so it seems that the map is not wide enough in order to wrap the whole planet).

What did I do wrong?

Adirondack
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selden
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Re: 3/4 cloud map

Post #2by selden » 24.07.2008, 11:19

You'll have to provide a copy of one of the texture image files for someone else to help.
However, I'd check to make sure it's actually 2048x1024. The symptom sounds consistent with the image being wider than 2048.
Selden

rthorvald
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Re: 3/4 cloud map

Post #3by rthorvald » 24.07.2008, 11:55

Email me the file and ssc, and i can have a look.

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Re: 3/4 cloud map

Post #4by Adirondack » 24.07.2008, 17:01

Yes, the map is is definitively 2048x1024.

The cloud map itself looks okay (resized to 1K):
test_clouds_1K.png

But when applied the cloud map just wrapped the planet 3/4
(planet is black for demonstration):
test_cloudmap.jpg

Here's a test-package for testing (incl. SSC) / ~ 1 MB [EDIT: Link removed]

Thanks in advance,

Adirondack
Last edited by Adirondack on 27.07.2008, 22:38, edited 1 time in total.
We all live under the same sky, but we do not have the same horizon. (K. Adenauer)

The horizon of some people is a circle with the radius zero - and they call it their point of view. (A. Einstein)

rthorvald
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Re: 3/4 cloud map

Post #5by rthorvald » 24.07.2008, 17:31

Ulrich,
Your cloudmap seems to lack an alpha channel, and is in index color mode.
Convert the image to RGB colors, and create a mask for the black, and you should be OK.

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BobHegwood
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Re: 3/4 cloud map

Post #6by BobHegwood » 24.07.2008, 17:36

Don't know if it makes any difference or not, but the image is also at an 8-bit depth, rather than the usual 24-bit depth.
Thanks, Brain-Dead
EDIT: Didn't mean to imply that this was my add-on. Sorry. Change the text above to reflect this. :wink:
Last edited by BobHegwood on 24.07.2008, 19:49, edited 1 time in total.
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Re: 3/4 cloud map

Post #7by rthorvald » 24.07.2008, 19:32

BobHegwood wrote:Don't know if it makes any difference or not, but the image is also at an 8-bit depth, rather than my usual 24-bit depth.
That is what i meant. Convert to RGB, and you will get all your 24 bits back :wink:

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