I found this youtube video where the crosses are changed to daggers:
- "DOTA2 - Minimap enemy icon X mod to Cross sword"
(I'm not interested in the other mods presented in the video).
However there is no source or instructions and I can't find anything else on it. It would be helpful if enemy units had less symmetrical icons, so their rotation was clearer on the minimap.
There are many guides to changing the size and color of minimap icons but not the shape. Is this possible and would it be a "legal" mod for online play?