material.renderQueue = 4000 has no effect.

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I need an object to be rendered on top of all others in the scene. I read that I could do this by setting the renderQueue property of my material.

 GetComponent<Renderer>().material.renderQueue = 4001;

Has no Effect at all. Other objects are still covering my object. I set this within the Awake() function of a script attached to the object I want to be on top. Is there something else I have to do?
(and no other object have not the same material)

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Answer by Eno-Khaon · Jan 20, 2016 at 11:07 AM

The Rendering Queue doesn't quite do what you think it does. While it does change the order in which objects are rendered, that doesn't change the process of determining whether to render them in the first place.

What you're looking for is part of shader code instead. In this case, this is a matter of changing the shader from the default of ZTest LEqual to ZTest Always. This will result in the object always rendering, no matter what's in front of or behind it, rather than only rendering if it is in front of another object.

That said, that doesn't mean that the Rendering Queue isn't a factor in this. If you have two objects, each set with ZTest Always, you can then be certain one will always render on top of the other by changing their position in the Rendering Queue.

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antx · Jan 21, 2016 at 08:40 AM 0

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Lets say I want to use the Unlit/Transparent shader. How would I go about changing it (or copying it and adjust the copy)? When I select "Edit shader" from the menu in the inspector I get a button to compile and show the code, but that does not seem to be what I need.

revolute antx · Jan 21, 2016 at 08:56 AM 0

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You need to download Unity's internal shaders if you are going to use shaders Unity provides. For other cases, do whatever you wish to do with it, any text editor is good enough.

antx · Jan 21, 2016 at 11:30 AM 0

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Okay, thanks to the two of you. I got it to work just as I wanted it. Downloaded shaders, made a copy of the unlit-alpha shader, set queue tag to "overlay" and added a "ZTest Always" line.

ubu2600 · Mar 24, 2017 at 02:06 PM 0

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This was tremendously helpful, thank you.

ComputerCables · Oct 01, 2018 at 08:14 PM 0

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O$$anonymous$$G Thanks!

l0calhost · Nov 08, 2021 at 08:11 PM 0

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Finally! I had been struggling with a similar problem for quite some time and the ZTest value hint solved it. Thanks!

material.renderQueue = 4000 has no effect.

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