Ok Anzak, I’ve replicated your function and for me it seems to work perfectly. Here is my function. It is basically a step-by-step copy of your function, just with some slight modifications, mainly caused by it being a function contained in BP_Grid_Manager. The math should be exactly the same:
For testing I’m activating this function through the level blueprint. This graph makes the tiles underneath the bounds of the actor inputted alternate between walkable and not when T is pressed:
Here is the result in game. Pressing T another time and rerunning pathfinding causes the tiles under the arrow to be walkable again.
Hope this is what you’re going for and that this will help you make it work.
By the way, how do you get the “- -” nodes in your function and the alternate way of getting local variables?