Going to put this in Mantle and not Natura. It helps with deal with M…

…etadata (Different Variants).

src/mantle/blocks/abstracts/ItemBlockVariants.java

@@ -0,0 +1,33 @@
+package mantle.blocks.abstracts;
+
+import mantle.blocks.iface.IBlockWithVariants;
+import net.minecraft.block.Block;
+import net.minecraft.item.ItemBlock;
+import net.minecraft.item.ItemStack;
+
+public class ItemBlockVariants extends ItemBlock
+{
+	private final IBlockWithVariants variantBlock;
+
+	public ItemBlockVariants(Block block)
+	{
+		super(block);
+
+		this.variantBlock = (IBlockWithVariants) block;
+		this.setMaxDamage(0);
+		this.setHasSubtypes(true);
+	}
+
+	@Override
+	public int getMetadata(int damage)
+	{
+		return damage;
+	}
+
+	@Override
+	public String getUnlocalizedName(ItemStack stack)
+	{
+		return super.getUnlocalizedName() + "." + this.variantBlock.getVariantNameFromStack(stack);
+	}
+
+}

src/mantle/blocks/iface/IBlockVariant.java

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+package mantle.blocks.iface;
+
+import net.minecraft.util.IStringSerializable;
+
+public interface IBlockVariant extends IStringSerializable
+{
+	int getMetadata();
+}

src/mantle/blocks/iface/IBlockWithVariants.java

@@ -0,0 +1,8 @@
+package mantle.blocks.iface;
+
+import net.minecraft.item.ItemStack;
+
+public interface IBlockWithVariants
+{
+	String getVariantNameFromStack(ItemStack stack);
+}

src/mantle/client/ModelVariant.java

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+package mantle.client;
+
+import net.minecraft.block.Block;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.resources.model.ModelBakery;
+import net.minecraft.client.resources.model.ModelResourceLocation;
+import net.minecraft.item.Item;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+import mantle.blocks.iface.IBlockVariant;
+
+@SideOnly(Side.CLIENT)
+public class ModelVariant
+{
+	private String modID;
+
+	public ModelVariant(String modId)
+	{
+		this.modID = modId;
+	}
+
+	public void registerItemRenderer(Block block, IBlockVariant[] variants)
+	{
+		String[] names = new String[variants.length];
+
+		for (int i = 0; i < variants.length; ++i)
+		{
+			IBlockVariant subtype = variants[i];
+			names[i] = (this.modID + ":") + subtype.getName();
+
+			this.registerItemRenderer(names[i], Item.getItemFromBlock(block), subtype.getMetadata());
+		}
+
+		ModelBakery.addVariantName(Item.getItemFromBlock(block), names);
+	}
+
+	public void registerItemRenderer(Block block, int meta)
+	{
+		this.registerItemRenderer(Item.getItemFromBlock(block), meta);
+	}
+
+	public void registerItemRenderer(Item item, int meta)
+	{
+		String name = (this.modID + ":") + item.getUnlocalizedName().substring(5);
+
+		this.registerItemRenderer(name, item, meta);
+	}
+
+	public void registerItemRenderer(String name, Block block, int meta)
+	{
+		this.registerItemRenderer(name, Item.getItemFromBlock(block), meta);
+	}
+
+	public static void registerItemRenderer(String name, Item item, int meta)
+	{
+		Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(item, meta, new ModelResourceLocation(name, "inventory"));
+	}
+}