URP Shader Graph: Is there Pixel Depth Offset?

[unity_MyWwvGAFstre6g]

Hello Unity community,

simple question: it is possible to activate Pixel Depth Offset in a URP shader graph? (it’d be used for object interpenetration using parallax occlusion mapping)

I assume that PDO is the type of advanced feature that is reserved for the HDRP, but I figured I’d ask anyways.

Thank you!

(edit: also lol at my username, it’s the company’s account ID)

[lilacsky824]

@unity_MyWwvGAFstre6g

Hello Unity community,

simple question: it is possible to activate Pixel Depth Offset in a URP shader graph? (it’d be used for object interpenetration using parallax occlusion mapping)

I assume that PDO is the type of advanced feature that is reserved for the HDRP, but I figured I’d ask anyways.

Thank you!

(edit: also lol at my username, it’s the company’s account ID)

No.
I need write a shader to use PDO with POM when I use URP.
It seems you can only acess Depth with manullay write a shader or use Amplify Shader Editor.

[Horus_Sungod42]

Thank you, that’s good information.

[JG-Denver]

You might find this reference useful in terms of accessing and manipulating depth:

Depth

[YetNeele]

Is this still not a thing in Unity 2022?

[nasos_333]

@YetNeele

Is this still not a thing in Unity 2022?

Bumping this as is a very important feature.

Is there any news on this for URP ?

[arkano22]

Yep, this is very important stuff for a lot of effects. Should definitely be there.

[SteveKouts]

Looking for info on this too. Id like to use it to blend detailed terrain meshes into terrain.

[FoodFish_1]

Yeah this is quite bad, this guy offers a workaround by generating shader and modifying the code:

Pass depth offset with shader graph?

Hi, I’m using the new URP and need to render a mesh without writing to the depth buffer and with an offset for the depth test. Normally this is configured in the shader’s pass (Unity - Manual: ShaderLab: defining a Pass). How can I do this with a shader graph (I’m using PBR Master)? Best, Martin

[nasos_333]

@FoodFish_1

Yeah this is quite bad, this guy offers a workaround by generating shader and modifying the code:
Pass depth offset with shader graph?

Nice find, though would be much welcome if they enabled it in the graph like in HDRP, same for tessellation

[arkano22]

@FoodFish_1

Yeah this is quite bad, this guy offers a workaround by generating shader and modifying the code:
Pass depth offset with shader graph?

Depth bias (the “Offset” attribute in regular shaders) and writing per-fragment depth are not the same thing. Depth bias uniformly offsets the depth for all fragments, but doesn’t allow for things like accurate intersections in parallax occlusion mapping, or ellipsoid splatting. So this workaround (copy-pasting ShaderGraph output and adding the “Offset” attribute manually) doesn’t work, or rather, it works around a different issue.

[Nexusmaster]

This topic is still not solved for URP please vote here:

Depth output for shader graph -> PDO(Pixel Depth Offset) -> terrain blending -> billboard shadows

Hi, I think a lot of people would appreciate having the possibility to add the SV_Depth output in shader graph for all render pipelines. (Like HDRP "Depth Offset output" but with no dependencies.) The SV_Depth is just an additional target in the fragment shader which will overwrite the depth information of the rendered object. Normally in a custom shader you just define it as an output, so in shader graph this could be an option or could be enabled by a local keyword definition. Here a po…

[jakesee]

This saved me. Thanks! – TLDR, in the inspector window for the Shader Graph asset, click on View Generated Code, then save the generated code as a .shader file, and then edit the code as needed.

I am changing the render queue and depth test offset using this method. It’s a workaround, but still a very neat one compare to other suggestions around the forums here.

[THE2FUN]

I will try brilliant !

[THE2FUN]

Can you share your PDO pass?

[andyz]

Still a problem in 2025?!

Editing the generated shader code is not a good solution - maybe a custom function node can do it?
Edit: you can subtract the view direction times a fraction from an object’s position in position-space to draw behind surfaces that z-fight. This is a bit clumsy as should also vary by distance and angle of view but may be sufficient for some

[cecarlsen]

Not having Depth Offset in URP ShaderGraph makes it difficult to migrate from HDRP. Any news on this?