Can you provide more information? Generally speaking creating the assets manually is quite difficult, are you using artist tools to do this? Artist tools creates all blendshapes for you through projection so you won't need to do these yourself. Injection masks do need to be updated at runtime, there is a way to force the repaint, you can do it like charMan.SyncAlphaInjection(). If you are not using Artist Tools I'd highly recommend using it instead.