how make normal unit hero Or a hero a beserker

how make normal unit hero Or a hero a beserker

hi i need help i made a skin for the beserker but when u copy a hero and change the model file to headhunter of course it wont work, but i dunno make it change to the beserker model.

Add animation prefix to morph or alternate (just look on berserker unit at botom of animation part of object data)

i dnt no what u mean can u plz tell me what to do in specific. thx