I am new to unity i want to add collider to the animating fbx imported from maya but the collider was not moving with the animation how can i come out of this problem can any one please suggest me to get out of this problem it is very urgent
its sounds like you have attached the Collider to your root of your fbx and your animation curves dont animate root. what you can do is find the top most game object that moving(change the transform values) with the Animations.
or you can generate mesh colliders on fbx import settings but mesh colliders are expensive.