PROJECT I - auto lighting and ANXIETY

Link to the gifs and stuff here:

https://www.youtube.com/post/UgkxbNWg-X8SlT5_RTiu7G3uVghzRCvrLE7g

bruh

I've been trying out some idea I had to setup the auto lighting in Toon Boom, and it was working well until I realized that the forearm shadow needs to be controlled by both the elbow joint AND the shoulder joint and i was like fUCc

As you can see in the first gif, I was happy with my setup for the upper arm. I tried the same thing for the lower arm then the horror i mentioned above entered my mind. Then i shit my gamer ass and tried to link them and it worked a little but not well at all and I kept tweaking it then I realized it was too complicated and then I got anXIOUS REEEEE || but anyway that's all in the 2nd gif

It's safe to say that I'm having some difficulty. Well, it's only safe to say if you're not near me.

3rd pic is a rundown of what I need to accomplish + the angles (according to the software) that each of the limbs are at in different positions PLUS what the light NEEDS to look like at those positions. I'm not sure what I can do but I'm hoping this guide will help me figure out some kinda math or some shi to help me code this shi. YES some coding is involved in this O_O Tips would be appreciated

I'll see what I can do. If I can't figure it out, maybe I'll just give up and upload a video of me crying for 10 hours.

No promises though, don't get excited.

I'll keep yall updated, wish me luck ._.