Clipping Mask is a feature I would like to see a major overhaul of, particularly as something very similar to After Effects' Mask. At the moment, the Clipping Mask of Spine is restricted to manually creating a polygonal area and controlling its vertices with weights (Pro).
If I can ask this, given a certain amount of time and addressing technical issues (e.g. RAM usage), can the developers of Spine possibly update the Clipping Mask so that it can detect or interpret the project's active alpha regions. It would also be great if you can include and exclude all the image layers for the target layer to clip within.
An example is a metal shield image and its glare image. I would like to control the glare's Translate keys and restrict its visibility within the shield image. However, there are potential complications: 1. The shield's design is so intricate that it can take time to design the Clipping Mask's polygon. 2. The shield is meshed and also being controlled by weights, so that means you need to make the Clipping Mask's weight behavior manually to reflect the shield's.
Redesigning the Masking feature, or adding to it, would improve the workflow a lot and really make Spine a powerful competitor.