I've been developing a mod for around 8-9 months now, and have around 500 hours of experience reverse engineering a basic understanding of Skill Design.

I'm heavily inspired by games like Path of Exile, Diablo 2 (And the MedianXL mod for it), and considering i'm not using the standard formula for Class Building, there are certain functions within those games that are analogous to what I want to develop. Considering i'm self taught, i've not been able to find particular functionalities that i'm interested in using.

I would be interested in knowing if the following is possible (a simple yes/ no will suffice, but elaboration and explanation is definitely welcome and appreciated);

• Can I make certain skills within the skill tree disable others? So both skills cannot be invested into?
• Can I make specific Unique Items affect the way certain skills work? For instance, an Item that would make a Fireball skill launch 3 Fireballs instead of 1?
• Can I make Skills on the Skill Tree Synergize (grant other bonuses) to other skills in the way Diablo 2 does?

Thanks in advance.

With 1, the thing that springs to mind is do it in the UI, if player has skill A then grey out and disable skill B.

I had a small thing I as working on some time back but haven't touched it since, it worked on a similar principle as I wanted selected 'skills' in a menu to be mutually exclusive, some depended on the player having other certain skills etc I'll see if I can find it and post it here. All I recall right now is that selecting a skill set a stat (boolean) and I enabled/disabled the UI element for each skill based on the values of the stat for each skill.

If anyone on the Discord can help you track down the BETA files for Torchlight 2, they might help as they had the original skill tree UIs in them which are pretty close to what you're trying to achieve.

All I have to hand right now is a screenie I posted somewhere that showed where I was trying to go with this, each green circle here was to represent a skill, you couldn't choose certain ones until you had made the connection between them by filling other slots;-

Thank you both for such a very descriptive response. I've read through the updated thread, but it may take another careful re-read to understand, I'm pretty sure i've got some undiagnosed learning disabilities haha. I am pretty happy that this is possible though, it was integral to what i'm trying to accomplish.

I find these tools to be a bit harder to use than the Grim Dawn tools of which i'm much more familiar with, but there's definitely more functionality to be found here.