public class AccumulatorRenderer extends TileEntityRenderer<TileAccumulator> {
    @Override
    public void render(TileAccumulator tile, double x, double y, double z, float partialTicks, int destroyStage) {
        GlStateManager.pushMatrix();

        // Translate to the location of our tile entity
        GlStateManager.translated(x, y, z);
        GlStateManager.disableRescaleNormal();

        // Render our item
        renderItem(tile);

        GlStateManager.popMatrix();
    }

    private void renderItem(TileAccumulator tile) {
        ItemStack stack = tile.getStackInSlot(0);
        if (!stack.isEmpty()) {
            RenderHelper.enableStandardItemLighting();
            GlStateManager.enableLighting();
            GlStateManager.pushMatrix();
            // Translate to the center of the block and .9 points higher
            GlStateManager.translated(0.5, 0.5, 1.5);
            GlStateManager.scalef(.4f, .4f, .4f);

            Minecraft.getInstance().getItemRenderer().renderItem(stack, ItemCameraTransforms.TransformType.NONE);

            GlStateManager.popMatrix();
        }
    }

}