Detail map

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http://www.gamedev.net/reference/articles/article2238.asp

http://www.gamedev.net/community/forums/topic.asp?topic_id=524002

http://blog.wolfire.com/2009/12/Detail-texture-color-matching

http://www.cppblog.com/mybios/archive/2006/11/16/15227.html

http://kb.cnblogs.com/a/1333113/


http://s9.zetaboards.com/Ultimate3D_community/topic/7137746/1/


http://www.azure.com.cn/article.asp?id=157

http://udn.epicgames.com/Three/TerrainAdvancedTextures.html#Detail%20Textures:%20Adding%20near-distance%20detail

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