Forge BlockState Items

NOTE: I have not tested any of this; It should work though as very similar code works for itemblocks.
Transforms and model may be able to be placed into "default", allowing for texture only changes per meta.


Clientside preInit:

ModelLoader.setCustomModelResourceLocation(--ITEM--, --META1--, new ModelResourceLocation(--MODID:FILENAME--, --SUBTYPE1--));
ModelLoader.setCustomModelResourceLocation(--ITEM--, --META2--, new ModelResourceLocation(--MODID:FILENAME--, --SUBTYPE2--));


blockstates\--FILENAME--.json

{
    "forge_marker": 1,
    "variants": {
        --SUBTYPE1--: [{
            "model": "",
            "textures": {},
            "transform": {}
        }],
        --SUBTYPE2--: [{
            "model": "",
            "textures": {},
            "transform": {}
        }]
    }
}