This is the textures you can use a plugin like itemsadder and create the config for them here is a wiki how https://itemsadder.devs.beer/plugin-usage/adding-content and you can find the plugin on the mcmodels page or you can search "Itemsadder"
@BlackSpigot.comI am reaching you about support for the Unity/VrChat Section of BlackSpigot.com. Please open a conversation with me I will send my discord. I need more file space in order to upload models, witch is what people want.