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Thread: Celestia Planet

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  1. #11

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    FWIW, here are three 8K texures in jpg format (to keep their sizes down). They're the surface texure, bumpmap and specular map.

    These 1-2MB maps have serious defects when examined closely due to the lossy JPEG compression. The accompanying planetary image and closeup were generated by Celestia. For them I used the lossless PNG equivalents of the JPEG maps, which were more than 5MB apiece. The original uncompressed PPM images were 96MB each.

    The land-and-snow-locked lake in the upper center of the planet image and in the closeup is split across the edges of the surface map at its upper right and left corners..

    The maps were created using the fractal planet generator "planet" by Torben Æ. Mogensen running under Cygwin on a 1.86 GHz Core2Duo system running Windows XP. Each map took a little over 8 minutes to generate from the seed 0.74321
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    Last edited by selden; 09-25-2009 at 06:27 PM. Reason: describe location of closeup
    Selden

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