online whiteboard - good suited to make mood boards
https://realtimeboard.com
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Should still be free, albeit limited download size per 24 hr. Lots of clean and even pre-tiled textures.
http://cgtextures.com
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tool to rip textures out of pictures
http://renderhjs.net/shoebox/textureRipper.htm
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http://www.polycount.com/forum/showthread.php?p=1894898
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http://www.photomatters.org/light-direction
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