// RenderRegistry.java
public class RenderRegistry
{
    public static void registerRenders()
    {
        // Items
        register(ItemRegistry.flammableBook, "flammableBook");
        register(ItemRegistry.pyromanticTome, "pyromanticTome");
        register(ItemRegistry.blaziumDiamond, "blaziumDiamond");
        register(ItemRegistry.fireBerry, "fireBerry");
        register(ItemRegistry.blaziumPick, "blaziumPick");
        register(ItemRegistry.goldenPotato, "goldenPotato");
        register(ItemRegistry.goldenPoisonousPotato, "goldenPoisonousPotato");
    }

    public static void register(Item item, String itemName)
    {
        ModelLoader.setCustomModelResourceLocation(item, 0, new ModelResourceLocation(Info.MODID + ":" + itemName, "inventory"));
    }
}

// block/blaziumLamp.json
{
    "parent": "block/cube_column",
    "textures": {
        "end": "pyromancy:blocks/blaziumLampTop",
        "side": "pyromancy:blocks/blaziumLampSide"
    }
}

// blockstates/blaziumLamp.json
{
  "variants": {
    "normal": {"model": "pyromancy:blaziumLamp"}
  }
}

// item/blaziumLamp.json
{
  "parent": "pyromancy:block/blaziumLamp",
  "display": {
    "thirdperson": {
      "rotation": [ 10, -45, 170 ],
      "translation": [ 0, 1.5, -2.75 ],
      "scale": [ 0.375, 0.375, 0.375 ]
    }
  }
}