Ptex: Per-Face Texture Mapping for Production Rendering is now OpenSource.
Ptex was used on virtually every surface in the feature film Bolt, and is now the primary texture mapping method for all productions at Walt Disney Animation Studios. So now even Mickey is doing OpenSource stuff for the happiness of everybody !!
To resume Ptex addresses all these issues by eliminating UV assignment, providing seamless filtering, and allowing any number of textures to be stored in a single file. See http://www.disneyanimation.com/library/ptex/ptex-teaser-big.png for details ;)
I definitvely in love to the approach because it allows you to have detailed texture for the places you want !
Link : Source