Shiny texture for skins

In multiple Minecraft spin offs, textures exist that let blocks and entities have shininess, emisiveness, roughness, etc. This has also been extended to vanilla using Vibrant Visuals. However, I think it would be nice to extend this capability to skins as well. This would let the player decide what parts of a skin glow, reflect light, etc. for more realism on skins. It can be as simple as another texture uploaded on the website, or built-in to Bedrock Character Creator items.