Rendering an itemstack above an entity

[The_Fireplace]

Hey guys, I want to render an itemstack from a slot in my entity's inventory above the entity. I would prefer for it to render like the EntityItem does. My question is, how do you recommend I do this? I would like to avoid causing a noticeable performance hit if possible.

It should also be noted that I plan to have this rendering disabled by default, and enabled by either using a keybind or equipping an item.

[diesieben07]

In your Renderer's doRender method you need to not only render your entity, but also the item. You can see how to render the item in RenderEntityItem.