Hi Nanako
I think this can be done as an Action with the steps I outline below.
To be honest, it is a little confusing to me as I usually number Layers from the botton up and apparently you do so from the top down.
I also don't know if you want to preserve all the Layers or not.
Also, using the nomenclature of "alpha" mask is used a lot of different ways so you last step of using the bottom Layer mask for the alpha channel is not clear to me (do you mean the transparency channel embedded with the pixel Layer?
So let me get you started. I will assume if you want to preserve any Layer then you will add that to my steps below. I will focus on only creating the combined Layer using the Layer Masks (not Vector Mask) as channels.
So I am ignoring the Baseshading Layer and Pupil Layer for now in this post
- First make sure any selection is deleted/turned off
- For the sclera, outer iris, and inner iris layers fill the pixels with pure black
- For Inner Iris Layer with Layer Mask right click and "Add Mask to Selection"
- Fill Layer with Blue
- Delete Selection
- Delete Layer Mask
- For Outer Iris Layer with Layer Mask right click and "Add Mask to Selection"
- Fill Layer with Green
- Delete Selection
- Delete Layer Mask
- For Sclera Layer with Layer Mask right click and "Add Mask to Selection"
- Fill Layer with Red
- Delete Selection
- Delete Layer Mask
- Change Blending mode of Sclera, and Outer Iris Layer to Linear Dodge (adds the Layers)
- Merge those 3 Layers and you should have a Layer with the RGB channels matching the Layer Masks as you specified.
After the above, it is simple to change the blending as desired of adding the last Layer or other steps. Just was not sure what you wanted.
The above approach (if I wrote the instructions correctly) is basically making each Layer its own independent R,G,B Layer with values per the Layer Mask and then adds up these independent channels. I am pretty sure this can all be done in an Action
Hope this gets you going.
BTW -
