Spine allows you to make multiple bounding boxes in an animation. Do any of you fine chaps know of a way to differentiate between them in GMS2? Such as during a collision event returning which bounding box the collision happened with.
No, sorry, the current implementation of the Spine runtime does not permit this. I've added a feature request to the database to get it added in the future, however, as it does seem like something that would be very useful.