There's a normal sized human model, and after I use AccuRIG to rig the model, export as a fbx file, it become 100 times smaller than the normal size when I import it to Unity. So I enlarged the normal sized model to 100 times bigger, and do the same thing as before, the size become normal, but the model become low poly, I wonder why this happen, and if it can fix, how?
PS: I'm a Chinese so my English may not good, there may some detail I can't description so specific.