Hi, nice thread. Here's a few seamless and tileable textures (I think I'm right in saying they are tileable). I knocked them up in imagesynth using imagery from GoogleEarth.

3 high altitude forest texs. Sorry not sure of the exact scale. Taken from Black Forest in Germany. 4096, 40 megs each

http://www.skindustry.net/medem/file.../output_03.tif

http://www.skindustry.net/medem/file...ut_03_blue.tif

http://www.skindustry.net/medem/file...t_03_green.tif

monks