windwalk

Guys is there a way to disable ability animations? Like how Windwalk or Beserk does, no animation. I am using 1.31.

I created a custom spell that 1) adds a modified (non-hero) WindWalk ability to the target; 2) orders to use it; 3) removes it. Unfortunately, flying units under its effect can only fly over other units but not over trees or obstacles. I wonder if there is an easy way to fix this behavior.