06-25-2007 11:27
It sounds like, when Second Life translates the .bvh file, it creates some sort of information regarding the rotation differences between frame #1 and frame #2, stores it as "reference data" or somesuch, then throws away frame #1. Then, when exporting a Second Life animation back to .bvh, the "reference data" is not reconstructed into a frame #1 reference frame. Thus, the frame #1 reference frame needs to be re-created before taking the animation back to Second Life.