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SubMaterial Tool (Modified version)

Orignal Addon: https://psteamcommunity.yuanyoumao.com/workshop/filedetails/?id=405793043

Usage: select index, select material, apply tool. Right click to revert.
You can copy current material with selected index from model by Reload.

Changes:
You can apply tool to yourself by holding down "Use" key (E by default)
You can reset all materials for a model by reverting the global material.
NPC corpses and player ragdolls will keep their materials.

Models with multiple skins can have different set of materials for each skin (other indexes), e.g. same part of model with skin 1 can have material 0, but in skin 2 it will have material 3.