mrdoob/three.js — pull request #3270 by WestLangley (2013-04-04 23:22:05+00:00)
Title: Fixed bug in Phong shader when using normal maps with derivative tangent...

...s

Also, since we did not have an example of using derivative tangents with normal maps with `MeshPhongMaterial`, I incorporated an example into `webgl_materials_normalmap.html`.