public static void renderArmorLayer(LayerArmorBase<ModelBase> layer, EntityLivingBase entity, float limbSwing, float limbSwingAmount, float partialTicks, float ageInTicks, float netHeadYaw, float headPitch, float scale, EntityEquipmentSlot slotIn) {
    ItemStack itemStack = entity.getItemStackFromSlot(slotIn);

    if (isArmorItem(itemStack, slotIn)) {
        IArmorItem armorItem = (IArmorItem) itemStack.getItem();
        ModelBase armorModel = layer.getModelFromSlot(slotIn);
        if (armorModel instanceof ModelBiped) {
            armorModel = ForgeHooksClient.getArmorModel(entity, itemStack, slotIn, (ModelBiped) armorModel);
        }
        armorModel.setModelAttributes(layer.renderer.getMainModel());
        armorModel.setLivingAnimations(entity, limbSwing, limbSwingAmount, partialTicks);
        layer.setModelSlotVisible(armorModel, slotIn);

        GlStateManager.enableBlend();
        GlStateManager.blendFunc(SourceFactor.ONE, DestFactor.ONE_MINUS_SRC_ALPHA);

        int layers = armorItem.getArmorLayersAmount(itemStack);
        for (int layerIndex = 0; layerIndex < layers; layerIndex++) {
            int i = armorItem.getArmorLayerColor(itemStack, layerIndex);
            float f = (float) (i >> 16 & 255) / 255.0F;
            float f1 = (float) (i >> 8 & 255) / 255.0F;
            float f2 = (float) (i & 255) / 255.0F;
            GlStateManager.color(f, f1, f2, 1.0f);
            String type = layerIndex == 0 ? null : "layer_" + layerIndex;
            layer.renderer.bindTexture(getArmorTexture(entity, itemStack, slotIn, type));
            armorModel.render(entity, limbSwing, limbSwingAmount, ageInTicks, netHeadYaw, headPitch, scale);
        }
        if (itemStack.hasEffect()) {
            LayerArmorBase.renderEnchantedGlint(layer.renderer, entity, armorModel, limbSwing, limbSwingAmount, partialTicks, ageInTicks, netHeadYaw, headPitch, scale);
        }
    }
}
 

public static void enableBlendAlphaStuffs() {
	GlStateManager.enableBlend();
	GlStateManager.tryBlendFuncSeparate(
		SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA,
		SourceFactor.ZERO, DestFactor.ONE);
	GlStateManager.disableTexture2D();
	GlStateManager.shadeModel(GL11.GL_SMOOTH);
}