Through the report feature, at the end of the game.
It hit, you were in its range. Skills don't always appear to hit their mark, Because the animation isn't the same as the actual skill shots width.
so what your saying is that the game sucks at the animations thinking you dodge something that is twice as big as it actually is
nope, just your character hit box as nasus and the ashe arrow were enough to hit
Hit box is indeed different than what you see. Difference between 3D models/ visual and 2D numbers .
This is oftenly seen more frequently with hooks skills such as blitz, thresh, naut.
Look up 'hit box league' on YouTube and you'll find plenty of videos about it.
I think you are mistaking what a scripter does really. Scripting has nothing to do with the size of the object. There have been more scripters thab usual it seems though.
if the arrow is point blank range its easy to lane long shots like bot to top are harder but even scripts can't predict where you are in fog of war, if you'll keep walking(etc) you just dealt with a good ashe
also as others have mentioned the hit box is bigger than it appears. Its roughly right, but again its a box not an arrow, so a little correction is fine