I am trying to use an OBJ model for an item. I have added my mod to the OBJLoader using this code:

OBJLoader.INSTANCE.addDomain(modid.toLowerCase());

But I don't know what to do after this. I tired simply making my OBJ model the parent of my item JSON but that gave this error:

java.lang.IllegalStateException: vanilla model 'net.minecraft.client.renderer.block.model.ModelBlock@70ec30b2' can't have non-vanilla parent

So how can apply an OBJ model to an item?

That works, but I want to be able to rotate, scale, and translate the model.

Thank you I figured it out. Heres the blockstate file I used:

{
    "forge_marker": 1,
    "defaults": {
        "model": "OBJ Model Here",
        "textures": {
            Textures Here
        },
        "transform": {
            Transformations Here
        }
    },
    "variants": {
        "inventory": [{}]
    }
}