Alternative to alpha shader for fading an object

I am currently working on fading an object out and in. I can get this to work fine using an Alpha shader, but the problem is that the Alpha/Diffuse shader renders differently from the standard Diffuse shader causing the player to render wrong in many places. Are there any alternatives to using an Alpha shader, or is there another solution I’m totally missing?

This is probably due to the “Queue” value, have a look for it in the docs. Fading stuff with alpha can be a bit expensive though, if you can get away with it then scaling the object down is a nice effect.