When I do some changes to my animators, sometimes I notice a float parameter named Blend with value of 0.0 appears in the parameter list of the animator.
I think this happens when I change blending mode or weight of a layer.
I didn't find any documentation for this. Anyone knows what does this parameter do and how to use it, Is it safe to delete it?
Blend is a default float variable they included for you to use in your scripts. You can safely remove it if you wish. The method for controlling animator variables is Anim.SetFloat. For example you might want to replace it with 'movementDirection' on a character controller. In Mechanim you control blends between x and y axis of animation combinations using external variables such as Blend