I noticed these normal decals from an Overwatch reference that somehow also allow diffuse information with a mask:
![Image: https://i.imgur.com/hYXiPfw.png](https://i.imgur.com/hYXiPfw.png)
From what I've experimented with, it doesn't seem possible in UE4? I was hoping someone knew if there was an actual solution or if this is just a limitation of the engine:
![Image: https://i.imgur.com/Gd4i0MY.png](https://i.imgur.com/Gd4i0MY.png)
Currently, it's a waste of polys but I'm just duplicating 2 versions of the decal and layering on top of each other. For some reason the roughness values change but it's the best result I got so far:
![](https://i.imgur.com/oTgXTAV.png)
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