For a game I'm planning, I want to make a passive skill tree. I want it to be similar to how the skill tree in Diablo 2 functioned, with a few categories built into each character that the player can choose from. But to simplify things, I want each 'skill' in the tree to be chosen only once.
The problem is that I'm not quite sure how to approach this. I considered using Yanfly's Picture Common Events plugin, but RPG Maker MV only allows 100 pictures (according to the plugin), and I don't know if it's possible to divide one picture into units. Even if it is, I'd need a way to designate if a skill has been chosen already, which means altering only a section of the picture. I'll likely need a custom plugin to pull this off, which I've never tried before. I have a basic idea of how to make one, and my programming skills are getting pretty good, but I don't quite know where to start, or even if this concept is possible to do in RPG Maker MV right now. Any ideas?