@GojiBerries: I’m glad you were able to get the Player Controller reference correctly (thanks, Mewbits!). The reason your original solution did not work is probably because you are using an empty player controller reference. You would need to set it up to reference a specific player controller for it to work with a single reference variable as you did in your original screenshot. You could do this by getting the player controller and casting this to ATBTT_Player_Controller just like Mewbits suggested and then use the output from the cast to set the specific reference for your ATBTT Player Controller ref variable. If you did this at event begin player you would not have to cast every time you needed to access the player controller in game. This only really matters if you want to access the player controller several times per tick, though, as casting is not very performant, or to make your blueprints easier to read.
I’m not sure if you’re aware, but I posted all the blueprints for my WIP cover and accuracy system a while ago here. It shares a lot of similarities with what you’ve done, but there are some differences. For instance, I am using line traces to check for cover instead of using a cover array. It works with multi-level grids and thin walls between tiles. Do you think this solution is something you could also use?
@Selentic: Great! I’ll be interested in hearing about your progress. I’m assuming there will still be some hurdles to overcome, but it seemed to work fine from my limited testing.