Now that we can render bumpmaps, we can see that the tangents used by the Box class are wrong. Update the texcoords and tangents of a box such that 2d textures render the same tangent orientation as if they were on every side of a Cubemap, then update the tangent array generation to match.

While working on this task you should join and remain in #PySoy on Freenode to get help, feedback, and guidance from mentors and other developers. Code updates which may affect your work are also announced here as they happen.

When you've done, commit your work and post the resulting changeset url to this task.