How to remove the overlay material?

[mgear]

so maybe its this issue,

Transparent Depth Shader (good for ghosts!)

So one of the things you will encounter when rendering complex meshs' using standard transparent rendering is that they depth test against the scene, but not against themselves. This is a limitation of how depth tested rendering works and there are some ways to work around this issue. I'm going to talk about one of them, then show you how to do it in Unity. So lets start by rendering a scene that has some complex geometry (in this context I am using complex to refer to geometry where there are…