Shader error: Undeclared Identifier "_BlendMode" after upgrading to HDRP 10.1.0

Unity Engine
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1

Got this error in a custom shader after upgrading from HDRP 10.0.0 preview.27 to HDRP 10.1.0 (Unity 2020.2.0b8).

Appreciate any help resolving this error.

2

Hey, it is now required to have _BlendMode defined as a property instead of the keywords BLENDMODE_ALPHA etc.

More information here Upgrading HDRP from 8.x to 10.x | High Definition RP | 10.1.0 (search _BLENDMODE_ALPHA to find the paragraph)

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Thank you very much, this resolved all our issues. Much appreciated, have a great weekend!

4

@francescoc_unity I am getting another shader error after upgrading;

Shader error in: unrecognized identifier ‘HDShadowContext’ at line 60 (on d3d11)

Do you have any pointers on how to address this also, much appreciated!

5

Without knowing your shader is hard to tell, but be sure “Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/Shadow/HDShadowContext.hlsl” is included somewhere before the shadow context is referenced.

AFAIK nothing changed between 10.0.0 preview.27 and 10.1.0 regarding that, but I might have missed something.

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6

After upgrading to latest HDRP 10.2.0 on git (release branch), I get the following shader error:

undeclared identifier ‘ComputeScreenPos’ at line 4663 (on d3d11)

Is this something you would be willing to help me sort out (I know I am using git, but trying to keep up :))

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7

Having exact same error. It would be awesome if someone could help us with that a bit.

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8

Same. Shaders that uses the built-in ComputeScreenPos function are no complaining about it being an undeclared identifier in HDRP 10.2.2 in Unity 2020.2.1f1.

9

Add: #include “Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderGraphHeader.hlsl”

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