Edited most of them with GIMP, as a result they're all seamless (in the x axis only), and can be used as skydome images.
Feel free to use and edit however you like, but credit:
"Planetside" - company that made terragen
"Skyhammer_216" - me, obviously
PS. the square murky cloud one is for use on the dagobah skydome.
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Some Examples:
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