Last updated: Sep 11, 2022
The Material Data struct maps a Material to a specific name for a Material Slot. These names are usually matched with a SkinnedMesh Component's list of names.
You can find the Material Data at this path: Assets\Infima Games\Low Poly Animated - Modern Guns\Demo\Code\Skins\MaterialData.cs
Link. This link represents what material slot to apply this Material to. Basically needs to match the MaterialSlot on the SkinnedMesh that you want to change.
Material. Material Reference.