Shader queue tags not working...?

Hi,

So firstly, I’m very new to writing shaders, so yeah… Ok, I’m trying to make a sort of unlit shader which renders after everything else. I don’t need it to display a texture, I just need it to be a solid colour. Here’s what I’ve got so far:

Shader "Unlit/Colour Overlay" {
Properties {
	_Color ("Color", Color) = (1,1,1)
}

SubShader {
	Tags {"Queue"="Overlay"} 
	Color [_Color]
	Pass {
	}
}

}

Currently, this shader works all except the rendering order. I thought that line 7 would make it render after everything else, but it doesn’t always. Out of the diffuse shader, the unlit texture shader, the transparent diffuse shader and a custom shader I made which is basically this except with “Geometry” instead of “Overlay”, the only one which this shader would render after was the transparent one. For all the others, if I had an object between an object with this shader and the camera, it would cover it up.

What’s confusing me is that I found a list in the manual of the order that these things should render in - it should go like this:
Background
Geometry
AlphaTest
Transparent
Overlay

So in theory, if my shader’s rendering after transparent, it should be rendering after geometry too.

I’m probably missing something very simple here, like I said I’m very new to writing shaders, but I just don’t understand what’s going wrong here. Anyone got any ideas what the problem could be?

Thanks

Sorting layers are for overlapping transparent objects. There’s another AlphaTest/ZTest setting which can tell you to always draw it, even if behind a solid object (as long as nothing in front of it is on a higher sorting layer.)