Don't know how or if possible...

[Popa]

Is there a way to make a block model for minecraft but only show the model once it's placed down? So if you had it in your hand or in your inventory it would have a normal default minecraft texture of a bookshelf for example but when you put it down somewhere it's the 3D creation you've made. If this can be done, please tell me how. I can't figure it out even if it might be obvious.