2009/3/26 Stefan Dösinger stefandoesinger@gmx.at:
I think position2 and normal2 are used with fixed function tweening.
Yes, but that's not actually implemented. If we ever do implement that in a shader we'll need to fit it into the existing 16 attributes. We'd probably have to make the mapping from fixed function attributes to attribute indices more dynamic, but I don't see that as much of a problem.