Originally Posted by Redenbacher
I've still yet to receive a clear answer as to why a blinks function differently than dashes/leaps when it comes to walls.
The only difference between the two should be that you can take damage mid-dash/leap. If you choose to blink halfway through a wall, you should faceplant and die.
To be clear, I'm not saying you should be unable to blink/dash through walls. I'm saying that if the range of the ability doesn't make it, the ability should fail. Just like if you miss a skillshot, it fails. Riot has been spouting 'clarity' as a design goal out of their every orifice, yet this one mechanism remains un-intuitive and unclear.
This be the reason: Blinks and dashes aren't programmed the same way. With a blink, the motion is instant; in one game 'tick,' the champion is at the starting location, and the very next 'tick' the champion is at the target location. The champion is never anywhere in between these points-so Kassadin can blink over Teemo shrooms, for example, since he doesn't touch them.
Dashes are different. The champion still goes through the entire distance from start to finish. Graves' dash cannot go through Teemo shrooms.
The point of this is that when Kass blinks, he spontaneously enters the middle of the wall. The game, of course, will not accept that, so it "pushes" him out of the wall through the shortest path. If Kass can blink more than halfway through a wall, the shortest path is through the other side.