…n. This is to allow consistency between Y up and Z up conventions - i.e. when we change state of the Billboard behavior, we should not have to transform the Billboard children for things to make sense. Also, AxialZ was rotated 180 degrees so that switching back and forth between ScreenAligned and AxialZ (with a 90 degree rotation around X) is consistent.
…n. This is to allow consistency between Y up and Z up conventions - i.e. when we change state of the Billboard behavior, we should not have to transform the Billboard children for things to make sense. Also, AxialZ was rotated 180 degrees so that switching back and forth between ScreenAligned and AxialZ (with a 90 degree rotation around X) is consistent.