I can never get clipping masks to work the same way twice. For some reason 20% of the time when I bring in the skeletons into Spine, the mask just doesnt apply, or applies to some assets and not others, or if there are multiple masks in the skeleton, SOME of the masks apply and not others.
Here is an example set up.
In this picture, the blue part is properly clearly masked into the red part.
In Unity, the mask just doesnt apply. The blue part is completely unmasked, its a huge square. Nothing I do makes it masked.
The mask MUST be bellow the red part and MUST be above the green part, and ONLY masking off that blue part. No other part can be affected by the mask. If I move around the order of the mask, say moving the blue part and mask to the top of the draw order, THEN the mask works, but ONLY if I set the mask's target to itself instead of the blue part. It doesnt make any sense.
In other files, any random combination of different arangement of slot orders works or doesnt work, its an exercise in insanity trying to understand this completely logic defying when-unity-decies-to-apply-the-mask-or-not.