Unreal模型文件调查

http://en.wikipedia.org/wiki/UE_Viewer

http://www.gildor.org/en/projects/umodel

http://wiki.beyondunreal.com/Legacy:Package_File_Format

http://worldofleveldesign.com/categories/udk/udk-basics-part1.php

http://paulbourke.net/dataformats/unreal/

Exporting meshes from UDK to Unity

http://create3dgames.wordpress.com/2012/09/11/udk-to-unity/