Orient vertex

[Nova]

The grass was made for a unity game, where we didn't want the grass to be self-shaded (Where the side facing a light was bright, the opposing side dark), but still be affected by light. We solved this by calculating the normals in unity by using a smoothing angle of 180. The grass now appears properly bright from both sides but is still affected by other things casting shadow on them, as well as attenuating properly with lights.